Integrated Principles of Zoology 16th Edition Hickman-Keen-Larson-Roberts test bank

<< Human Development A Cultural Approach 1st Edition By Arnett-Test Bank Integrated Business Processes With ERP Systems 1st Edition by Simha R.Magal Test Bank >>
Product Code: 222
Availability: In Stock
Price: $24.99
Qty:     - OR -   Add to Wish List
Add to Compare

Integrated Principles of Zoology 16th Edition Hickman-Keen-Larson-Roberts test bank

Description

WITH ANSWERS
Integrated Principles of Zoology 16th Edition Hickman-Keen-Larson-Roberts

Chapter 02

The Origin and Chemistry of Life

 

 

Multiple Choice Questions

  1. Spontaneous generation was first proposed as
    A.a concept to explain the formation of the first living cells on earth.
    B. a concept to explain the evolution of simple chemicals into complex macromolecules.
    C. an explanation for the appearance of maggots and mice from rotting material, fish from leaves that fall into water, etc.
    D. an explanation by Pasteur accounting for the germination of spores in broth.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Spontaneous Generation of Life?
Topic: Spontaneous Generation of Life?

  1. Pasteurs work with spontaneous generation showed that
    A. life could not have evolved from non-living chemistry on the early earth.
    B.  mice came from mother mice and maggots from mother flies.
    C.  simple chemicals could become complex organic macromolecules without any living cell involved.
    D.  broth did not ferment spontaneously but required contamination with organisms.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Spontaneous Generation of Life?
Topic: Spontaneous Generation of Life?


 

  1. The hypothesis that simple chemicals may have naturally become complex macromolecules by natural physical forces was first proposed by
    A. Stanley Miller.
    B.  Graham CairnsSmith.
    C.  Alexander Oparin and J.B.S. Haldane.
    D.  Sidney Fox.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Spontaneous Generation of Life?
Topic: Spontaneous Generation of Life?

  1. A solution that has a pH of 5 has
    A. a concentration of H+ 20 times higher than water.
    B.  a concentration of H+ 100 times higher than water.
    C.  a concentration of H+ the same as water.
    D.  a concentration of H+ 20 times lower than water.
    E.  a concentration of H+ 100 times lower than water.

 

Accessibility: Keyboard Navigation
Blooms Level: 3. Apply
Gradable: automatic
Section: Water and Life
Topic: Water and Life

  1. A dissolved substance that has the ability to either remove or add H+ and OH ions to resist pH changes is
    A. a solution.
    B.  pure water.
    C.  a buffer.
    D.  a solvent.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Water and Life
Topic: Water and Life


 

  1. Most organic molecules are associated with living organisms. Which of the following statements is NOT related to the general distinctions between these types of molecules?
    A. Carbon dioxide (CO2) lacks hydrogen atoms found in most organic molecules and therefore is usually not considered to be organic.
    B.  Formaldehyde (CH2O) is a small molecule compared to most organic molecules but does have carbon and hydrogen covalently bonded together and therefore is considered to be organic.
    C.  Salt (Na+Cl ) is not an organic molecule but is important to the life of many organisms.
    D.  Organic carbon atoms are more diverse than inorganic carbon molecules that form the molecular structure of soot or a diamond from pure carbon.
    E.  All of the choices are correct.

 

Accessibility: Keyboard Navigation
Blooms Level: 4. Analyze
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Perhaps a better description of an organic compound is that an organic compound is any substance
    A. derived from living matter.
    B.  containing carbon.
    C.  found within a cell.
    D.  consumed by animals.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. Carbohydrates are categorized into
    A. organic and inorganic carbohydrates.
    B.  saturated and unsaturated carbohydrates.
    C.  monosaccharides, disaccharides and polysaccharides.
    D.  primary, secondary, tertiary and quaternary carbohydrates.
    E.  monomer and polymer carbohydrates.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Which of the following is a structural carbohydrate molecule?
    A. Sucrose
    B.  Glycogen
    C.  Cellulose
    D.  Glucose

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Which of the carbohydrates given below is a major component of the cuticle of arthropods (e.g., insects, crayfish, etc.)?
    A. Starch
    B.  Chitin
    C.  Cellulose
    D.  Glycogen

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. Which of the following carbohydrates is used in animal muscle and liver cells for energy storage?
    A. Starch
    B.  Chitin
    C.  Cellulose
    D.  Glycogen

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Which of the following is the most abundant carbohydrate in the world?
    A. Cellulose
    B.  Glycogen
    C.  Fructose
    D.  Glucose

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Polysaccharide are polymers made up of which kind of monomers?
    A.Simple sugars
    B. Amino acids
    C. Nucleotides
    D. Alternating sugar and phosphate groups
    E. Fatty acids and glycerol

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. The three principal groups of lipids are neutral fats, phospholipids, and
    A. glycogen.
    B.  steroids.
    C.  amino acids.
    D.  fatty acids.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Neutral fats are
    A. stored as glycogen.
    B.  not stored.
    C.  made of fatty acids and glycerol.
    D.  made of chains of fatty acids linked together by water molecules.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Lipids are polymers made of which monomers?
    A.Glucose or modified glucose molecules
    B. Amino acids
    C. Alternating sugar and phosphate groups
    D. Fatty acids and glycerol

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. A dehydration synthesis reaction is also
    A. a condensation reaction.
    B.  a hydrolysis reaction.
    C.  an isomeric reaction.
    D.  a reaction that does not require enzymes.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Chemical Evolution
Section: Organic Molecular Structure of Living Systems
Topic: Chemical Evolution
Topic: Organic Molecular Structure of Living Systems

  1. Which of the lipid groups below is structurally unlike the others?
    A.Steroids
    B. Neutral fats
    C. Triglycerides
    D. Phospholipids

 

Accessibility: Keyboard Navigation
Blooms Level: 2. Understand
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Which of the following lipids forms a bilayer between two fluid regions, such as in the plasma membrane of a cell?
    A.Steroids
    B. Waxes
    C. Phospholipids
    D. Lipoproteins

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. Which of the following is NOT a steroid?
    A.Vitamin D
    B. Adrenocortical hormones
    C. Sex hormones
    D. Cholesterol
    E. All of the choices are steroids

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Cholesterol belongs to which of the following groups?
    A.Steroids
    B. Neutral fats
    C. Carbohydrates
    D. Phospholipids

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. If an animal needs to store high-energy compounds for long-term use with the least amount of extra body weight, which would be the best molecule for storage?
    A.Fructose and glucose in the form of honey
    B. High-calorie fat molecules
    C. Starch
    D. Glycogen with extensive side branches of glucose

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. A protein is a polymer made up of which kind of monomers?
    A.Glucose or modified glucose molecules
    B. Amino acids
    C. Nucleotides
    D. Fatty acids and glycerol

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. A peptide bond is found in which type of biological molecule?
    A.Carbohydrate
    B. Lipid
    C. Protein
    D. Simple sugar

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. A chain consisting of a number of amino acids is a
    A. quaternary structure.
    B.  dipeptide.
    C.  polypeptide.
    D.  None of the choices are correct.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. In a protein, the folding of a polypeptide into a three-dimensional structure, usually stabilized by covalent bonds between the side groups of the amino acids, is the
    A. primary structure.
    B.  secondary structure.
    C.  tertiary structure.
    D.  quaternary structure.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. The alpha helix is found at which level of protein organization?
    A.Primary structure
    B. Secondary structure
    C. Tertiary structure
    D. Quaternary structure

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. The splitting of one compound into two by the addition of water is called
    A. covalent.
    B.  ionic formation.
    C.  hydrolysis.
    D.  condensation.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. You eat eggs for breakfast and return in the evening to dirty dishes with dried on yellow streaks. After soaking awhile, the egg yolk protein molecules easily wash off. What happened?
    A.Heating denatured the egg protein molecules, hydrolysis reactions then formed bonds in the dried egg yolk, and soaking in water eventually resulted in condensation reactions where water broke these bonds
    B. Heating denatured the egg protein molecules, unorganized condensation reactions formed bonds in the drying egg, and soaking in water resulted in hydrolysis reactions where water broke these bonds
    C. Egg monomers were fused to become one polymer, which was easily dissolved by water back into monomers
    D. Addition of water converted organic molecules into inorganic molecules

 

Accessibility: Keyboard Navigation
Blooms Level: 3. Apply
Gradable: automatic
Section: Chemical Evolution
Topic: Chemical Evolution

  1. At the molecular level, a cells ability to vary in its operational tolerance to temperature, etc., is most closely related to
    A. enzyme activity and protein denaturation.
    B.  ATP efficiency.
    C.  replication of nucleic acids.
    D.  extent of saturation of fatty acids.

 

Accessibility: Keyboard Navigation
Blooms Level: 2. Understand
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. DNA and RNA are polymers composed of repeated units called
    A. nucleotides.
    B.  bases.
    C.  sugars.
    D.  None of the choices are correct.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. A nucleic acid is a polymer made up of which kind of monomers?
    A.Amino acids
    B. Nucleotides
    C. Glucose or modified glucose molecules
    D. Alternating sugar and phosphate groups

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Nucleic acids are important because they
    A. act as buffers.
    B.  are the basic units of neutral fats.
    C.  direct the synthesis of proteins.
    D.  None of the choices are correct.

 

Accessibility: Keyboard Navigation
Blooms Level: 2. Understand
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. Which of these statements is true about DNA?
    A.It is the genetic material of the cell
    B. It forms a protein
    C. It is pure amino acid
    D. It contains no sugar

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Fish sperm is mostly made of male DNA. A chemical test would find high amounts of
    A. nitrogenous bases, sugar, and phosphate groups.
    B.  phospholipids and steroids.
    C.  amino acids and unsaturated fats.
    D.  triglycerides and ATP.
    E.  globular proteins and stored fats.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Prions are infectious
    A. carbohydrates.
    B.  proteins.
    C.  lipids.
    D.  Prions are not actually infectious.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. Which of the following forms of energy is NOT one of those thought to have been involved in the production of large organic molecules in the primitive reducing atmosphere?
    A.Radioactivity
    B. Electrical energy
    C. Radiation from the sun
    D. Sound

 

Accessibility: Keyboard Navigation
Blooms Level: 2. Understand
Gradable: automatic
Section: Chemical Evolution
Topic: Chemical Evolution

  1. The term reducing atmosphere for the early earth means that the atmosphere
    A. was much thinner around the surface of the earth than now.
    B.  contained only two or three kinds of gases.
    C.  contained little or no free oxygen.
    D.  contained little or no free nitrogen.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Chemical Evolution
Topic: Chemical Evolution

  1. Who first performed an experiment that proved that amino acids could be produced in the laboratory from a reducing atmosphere and electrical sparks?
    A.Stanley Miller and Harold Urey
    B. Graham CairnsSmith
    C. Thomas Cech
    D. Alexander Oparin and J.B.S. Haldane

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Chemical Evolution
Topic: Chemical Evolution


 

  1. Which of the following is a correct statement about oxidation reduction reactions?
    A.Reduction is the loss of electrons
    B. Reduction is the loss of hydrogen atoms
    C. Oxidation is the loss of electrons or hydrogen atoms
    D. Reduction and oxidation sometimes occur together, but not always

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Chemical Evolution
Topic: Chemical Evolution

  1. Which of the following kinds of molecules is thought to have been absent from the primitive reducing atmosphere?
    A.Water vapor (H2O)
    B. Carbon dioxide (CO2)
    C. Oxygen (O2)
    D. Nitrogen (N2)

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Chemical Evolution
Topic: Chemical Evolution

  1. An alternative environment to the hot dilute soup and clay hypothesis that offers a possible source of energy and molecules for the origin of life is/are the
    A. frozen Antarctic ice sheets.
    B.  surface of Mars.
    C.  hydrothermal vents in ocean bottoms.
    D.  Earth mantle and core.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Chemical Evolution
Topic: Chemical Evolution


 

  1. Water has which of the following important characteristics that explain its key role in living systems?
    A.High specific heat capacity
    B. High surface tension
    C. Is an excellent solvent
    D. All of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Water and Life
Topic: Water and Life

  1. A molecule of RNA that has enzymatic or catalytic properties is called a _______________.
    A. deoxyribose
    B.  nucleotide
    C.  ribonucleic acid
    D.  ribozyme

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Origin of Living Systems
Topic: Origin of Living Systems

  1. The fact that nucleic acids are very complicated molecules suggests that
    A. the RNA-first hypothesis is impossible.
    B.  the protein-first hypothesis is therefore the only plausible hypothesis.
    C.  no natural system could ever generate them.
    D.  None of the choices are correct.

 

Accessibility: Keyboard Navigation
Blooms Level: 3. Apply
Gradable: automatic
Section: Origin of Living Systems
Topic: Origin of Living Systems


 

  1. The ancestral protocells
    A. may have contained RNA or DNA as their genetic material.
    B.  may have evolved before the development of a true cell.
    C.  may have had a lipid and protein membrane surrounding them, forming a proteinoid microsphere.
    D.  may have contained a biochemical pathway for energy metabolism.
    E.  All of the choices are correct.

 

Accessibility: Keyboard Navigation
Blooms Level: 5. Evaluate
Gradable: automatic
Section: Origin of Living Systems
Topic: Origin of Living Systems

  1. Biological evolution differs from chemical evolution in that biological evolution would have been possible only after the development of
    A. true cells capable of replication.
    B.  nucleic acids.
    C.  enzymes.
    D.  a metabolic pathway.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Chemical Evolution
Section: Origin of Living Systems
Section: Precambrian Life
Topic: Chemical Evolution
Topic: Origin of Living Systems
Topic: Precambrian Life

  1. Heating dry mixtures of amino acids and then mixing them with water forms small
    A. strands of DNA.
    B.  living cells.
    C.  proteinoid microspheres.
    D.  plasma membranes.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Chemical Evolution
Topic: Chemical Evolution


 

  1. If the hypothesis that protocells were based on an RNA world is correct, what would be necessary to shift to a DNA world?
    A.An enzyme or reaction capable of removing one oxygen from ribose in nucleotides
    B. Enzymes for reverse transcription of RNA into DNA
    C. New enzymes to replicate the DNA
    D. New enzymes for transcribing DNA back to RNA
    E. All are necessary to switch to a DNA world.

 

Accessibility: Keyboard Navigation
Blooms Level: 4. Analyze
Gradable: automatic

  1. Scientists once assumed that the earliest protocells would have been autotrophs. This concept appears to be
    A. correct, since heterotrophs would depend upon eating autotrophs.
    B.  correct, since glycolysis and fermentation only occur after oxygen is present from photosynthesis.
    C.  incorrect, since the primordial soup likely contained many preformed food molecules suitable for heterotrophic metabolism.
    D.  incorrect, since glycolysis and fermentation require complex enzymes for catalytic reactions.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Origin of Living Systems
Topic: Origin of Living Systems

  1. Prokaryotic cells are represented by fossils that are dated back as far as _____ billion years ago.
    A. 1.5.
    B.  2.8.
    C.  3.8.
    D.  4.8.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Origin of Living Systems
Topic: Origin of Living Systems


 

  1. The Precambrian-Cambrian boundary is
    A.A point that separates reduction environments from oxidation environments
    B. The separation point between prokaryotes and eukaryotes
    C. A point of dramatically increased fossilization, although it is likely that many animal groups existed before this time
    D. The shift-over from plants to animal life

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Precambrian Life
Topic: Precambrian Life

  1. The first eukaryotic cells probably arose about _____ billion years ago.
    A.1.5
    B. 2.5
    C. 3.5
    D. 4.5

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Precambrian Life
Topic: Precambrian Life

  1. Which pairing of occurrence and date is correct?
    A.Beginning of Cambrian 600 million years ago
    B. Origin of life 3.8 billion years ago
    C. Origin of eukaryotic cells 1.5 billion years ago
    D. All the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Precambrian Life
Topic: Precambrian Life


 

  1. Our current understanding of the origin of eukaryotic organelles such as mitochondria is that they
    A. were copies of a cell nucleus that failed to be separated by cytokinesis.
    B.  are prokaryotes that were taken into a cell and now live there symbiotically.
    C.  are variations of the plasma membrane.
    D.  are new forms of life that arose inside other cells.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Precambrian Life
Topic: Precambrian Life

 

Fill in the Blank Questions

  1. The term ____________ refers broadly to compounds that contain carbon.
    organic

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. The most important of the energy-storing carbohydrate monomers is the molecule _______________.
    glucose

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. The molecule ___________ is an important form for storing sugar in animals and is found mainly in the liver and muscle cells of animals.
    glycogen

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. A(n) _______________ fatty acid has two or more carbon atoms joined by double bonds.
    unsaturated

 

Blooms Level: 1. Remember
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. Amino acids are linked together to form proteins by __________ bonds.
    peptide

 

Blooms Level: 1. Remember
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. The alpha-helix is an example of the _______ structure of a protein.
    secondary

 

Blooms Level: 1. Remember
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems

  1. When hemoglobin takes up or releases oxygen, it undergoes a change in its _________ structure.
    quaternary

 

Blooms Level: 1. Remember
Section: Organic Molecular Structure of Living Systems
Topic: Organic Molecular Structure of Living Systems


 

  1. Submarine hot springs where seawater seeps through cracks in the bottom and comes close to the hot magma are called __________ ___________.
    hydrothermal vents

 

Blooms Level: 1. Remember
Section: Chemical Evolution
Topic: Chemical Evolution

  1. Most biological polymerizations are ___________ dehydration reactions in which monomers are linked together by removal of water.
    condensation

 

Blooms Level: 1. Remember
Section: Chemical Evolution
Topic: Chemical Evolution

  1. Sidney Fox studied the synthesis of polypeptides into polymers which in water formed small spherical bodies called ____________ _____________.
    proteinoid microspheres

 

Blooms Level: 1. Remember
Section: Chemical Evolution
Topic: Chemical Evolution

  1. A critical answer to the chicken-or-the-egg problem formed by the nucleic-acid-or-enzyme-first dilemma is perhaps solved by the discovery of catalytic RNA called _______________.
    ribozymes

 

Blooms Level: 1. Remember
Section: Origin of Living Systems
Topic: Origin of Living Systems


 

  1. The earliest source of reduced compounds for oxidative metabolism was probably ____________ _____________.
    hydrogen sulfide

 

Blooms Level: 1. Remember
Section: Origin of Living Systems
Topic: Origin of Living Systems

  1. Bacteria contain a single, large molecule of DNA in the ____________ region.
    nucleoid

 

Blooms Level: 1. Remember
Section: Origin of Living Systems
Topic: Origin of Living Systems

  1. The ______________ theory proposes that pre-eukaryotes are the result of anaerobic bacteria ingesting aerobic bacteria and subsequently a symbiotic relationship was formed.
    endosymbiotic

 

Blooms Level: 1. Remember
Section: Precambrian Life
Topic: Precambrian Life

 

Essay Questions

  1. Describe the first evidence for chemical evolution that came from Stanley Millers experiment.

Answers will vary.

 

Blooms Level: 2. Understand
Section: Chemical Evolution
Topic: Chemical Evolution


 

  1. This chapter began with Pasteur disproving spontaneous generation, the theory that life could arise from non-living material. Then Miller and Urey test the Oparin-Haldane hypothesis and suggest that life once did arise from non-living chemicals. Are these experiments contradictory? Explain how the science community recognize both as valid.

Answers will vary.

 

Blooms Level: 4. Analyze
Section: Chemical Evolution
Section: Spontaneous Generation of Life?
Topic: Chemical Evolution
Topic: Spontaneous Generation of Life?

  1. The Miller-Urey experiments demonstrated the formation of larger molecules from simple molecules. Why is there still a need for concentration in order to make formation of a protocell more likely?

Answers will vary.

 

Blooms Level: 2. Understand
Section: Chemical Evolution
Topic: Chemical Evolution

  1. Assumptions that the earliest life forms had to make their own food have been replaced with the belief that the earliest microorganisms were definitely primary heterotrophs. How could these earliest cells have lived if they did not make their own food, and why do we feel certain that they were not photosynthetic?

Answers will vary.

 

Blooms Level: 2. Understand
Section: Chemical Evolution
Topic: Chemical Evolution


 

  1. What evidence do scientists have that the earths primeval atmosphere was a reducing atmosphere?

Answers will vary.

 

Blooms Level: 4. Analyze
Section: Chemical Evolution
Topic: Chemical Evolution

  1. Why cant we set up an experiment that would again duplicate the conditions that were present at the early origin of protocells?

Answers will vary.

 

Blooms Level: 4. Analyze
Section: Origin of Living Systems
Topic: Origin of Living Systems

  1. Describe the chicken-or-the-egg dilemma with enzymes and hereditary molecules, and detail how the RNA world proposal offers a solution.

Answers will vary.

 

Blooms Level: 4. Analyze
Section: Origin of Living Systems
Topic: Origin of Living Systems

  1. What are the essential properties of a protocell?

Answers will vary.

 

Blooms Level: 2. Understand
Section: Origin of Living Systems
Topic: Origin of Living Systems


 

  1. Describe the symbiotic theory of the origin of eukaryotes.

Answers will vary.

 

Blooms Level: 2. Understand
Section: Precambrian Life
Topic: Precambrian Life

  1. What may have been the reason for the Cambrian explosion?

Answers will vary.

 

Blooms Level: 2. Understand
Section: Precambrian Life
Topic: Precambrian Life

  1. What evidence leads researchers to believe that there was a diversity of animal life before the Cambrian if we cannot find extensive fossils of earlier animals?

Answers will vary.

 

Blooms Level: 1. Remember
Section: Precambrian Life
Topic: Precambrian Life

  1. Compare and contrast the prokaryotic and eukaryotic cellular structures.

Answers will vary.

 

Blooms Level: 2. Understand
Section: Origin of Living Systems
Section: Precambrian Life
Topic: Origin of Living Systems
Topic: Precambrian Life


 

  1. If eukaryotes are more complex than prokaryotes, then why are there prokaryotes living today?

Answers will vary.

 

Blooms Level: 3. Apply
Section: Origin of Living Systems
Topic: Origin of Living Systems

  1. Does the recognition of prokaryotes as two major lineages, Archaebacteria and Eubacteria, result in any major changes to the internal taxonomic arrangement of the fungi, protozoan groups, plants and animals?

Answers will vary.

 

Blooms Level: 4. Analyze
Section: Origin of Living Systems
Topic: Origin of Living Systems

Chapter 14

Acoelomorpha, Platyzoa, and Mesozoa

 

 

Multiple Choice Questions

  1. Animals with three well-defined germ layers and that have one solid mass of tissue rather than tissues and organs nestled inside a body cavity are
    A.acoelomate and triploblastic.
    B. eucoelomate and diploblastic.
    C. pseudocoelomate and triploblastic.
    D. quasicoelomate and diploblastic.
    E. coelomate and triploblastic.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The flatworms typically have _______ cleavage.
    A.Radial
    B. Bilateral
    C. Rotational
    D. Discoidal
    E. Spiral

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Acoelomorpha
Topic: Phylum Acoelomorpha


 

  1. Which of the following is not a class of the phylum Platyhelminthes?
    A. Cestoda
    B.  Trematoda
    C.  Nemertea
    D.  Turbellaria
    E.  Monogenea

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Tissues that seem to violate the cell theory because the nuclei are not separated by cell membranes are
    A. parenchymal.
    B.  syncytial.
    C.  tegumental.
    D.  rhabdites.
    E.  vitellaria.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. A planarian feeds by
    A. attaching with a sucker and extracting blood.
    B.  scraping and sucking food particles via a midventral proboscis.
    C.  engulfing food particles through an anterior mouth and excreting waste via an anus.
    D.  soaking all nutrients from the environment through its thin epidermal surface.
    E.  sucking nutrients in from the environment through its flame cell system.

 

Accessibility: Keyboard Navigation
Blooms Level: 4. Analyze
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. Which of the following is not a characteristic of Trochophore larvae?
    A.Have a prominent circlet of cilia
    B. Are top-shaped
    C. They occur in the early development of marine forms of Annelida
    D. Their bodies are opaque
    E. They sometimes contain accessory cilia circlets

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. In flame cells,
    A. light is detected.
    B.  ciliated sperm are stored.
    C.  undigested food is expelled.
    D.  slow fires burn food for energy.
    E.  cilia drive fluids through tubules for excretion.

 

Accessibility: Keyboard Navigation
Blooms Level: 2. Understand
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The nervous system of a freshwater planarian consists of
    A. only a diffuse subepidermal nerve plexus underneath the ventral skin.
    B.  a simple brain of ganglion cells leading to a ladder-type nerve network.
    C.  only sensory and motor neurons, but no association neurons.
    D.  the first complex central nervous system.
    E.  no cells since they were lost along with other unnecessary systems in parasites.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. Turbellarians, such as the planaria, move by
    A. flame cells.
    B.  small pseudopodia.
    C.  lateral undulation of muscles.
    D.  expulsion of fluids as seen in squid.
    E.  secreting a slime track of mucus and pushing against it with epidermal cilia and muscular waves.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Endolecithal describes a situation in which
    A. there is no yolk.
    B.  yolk is contained in separate cells outside the zygote.
    C.  yolk is provided inside the egg cell.
    D.  yolk is found around the perimeter of the zygote.
    E.  yolk is provided by the sperm cell.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Because some turbellarians fail to add yolk to the egg cells as they undergo oogenesis, yolk cells surround the zygote to provide nourishment. This development is referred to as
    A. endolecithal.
    B.  ectolecithal.
    C.  syncytial.
    D.  oncospherical.
    E.  hydatid.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. The male copulatory organ of turbellarians is called a
    A. rhabdite.
    B.  pilidium.
    C.  cirrus.
    D.  hydatid.
    E.  gonopore.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Which of the following statements about planaria is NOT true?
    A.The rudimentary circulatory system has a small central heart
    B. Planaria cut in half regenerate to form two complete worms
    C. Movement occurs through ciliary cells and muscle movement
    D. Tissue levels include endoderm (inner), mesoderm (middle), and ectoderm (outer)
    E. Cephalization consists of a brain and sense organs in a head region

 

Accessibility: Keyboard Navigation
Blooms Level: 4. Analyze
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Monogeneans hatch as
    A. fully mature adults.
    B.  free-swimming larvae.
    C.  flagellated, amoeboid larvae.
    D.  larvae resembling gemmules of freshwater sponges.
    E.  None of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. In flame cells,
    A. flagella drive fluid through tubules.
    B.  digestion of proteins takes place.
    C.  excretion of proteins is one important function.
    D.  heat is intense as energy is released.
    E.  None of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 4. Analyze
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The monogenetic flukes
    A. are mostly ectoparasites.
    B.  are usually found in rabbits.
    C.  require an intermediate and a definitive host.
    D.  All of the choices are correct
    E.  None of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The correct sequence of development in a typical fluke life cycle is
    A. egg, miracidium, cercaria, sporocyst.
    B.  egg, miracidium, sporocyst, cercaria.
    C.  egg, sporocyst, cercaria, miracidium.
    D.  egg, cercaria, miracidium, sporocyst.
    E.  egg, sporocyst, miracidium, cercaria.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. The name of the free-swimming, ciliated stage that hatches from a trematode egg is the
    A. miracidium.
    B.  sporocyst.
    C.  cercaria.
    D.  scolex.
    E.  proglottid.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Humans become infected with lung flukes by
    A. eating infected fish.
    B.  eating infected crabs or crayfish.
    C.  drinking water contaminated with eggs.
    D.  wading in infected waters.
    E.  eating undercooked pork.

 

Accessibility: Keyboard Navigation
Blooms Level: 2. Understand
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The blood fluke Schistosoma is
    A. an endoparasite and a Monogenean.
    B.  an endoparasite and a Digenean.
    C.  an ectoparasite and a Digenean.
    D.  an ectoparasite and a Monogenean.
    E.  None of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. A farmer in a rice paddy in Asia becomes infected with the liver fluke by
    A. eating infected snails.
    B.  drinking water contaminated with eggs.
    C.  eating infected fish that is undercooked or uncooked.
    D.  swimming or wading in infected water, where the cercariae enter the skin.
    E.  None of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The intermediate host of the blood fluke is a
    A. crayfish.
    B.  human.
    C.  frog.
    D.  dog.
    E.  None of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 4. Analyze
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Which is NOT a correct association of blood flukes?
    A.Schistosoma mansoniveins of large intestine
    B. Schistosoma japonicumveins of small intestine
    C. Schistosoma haematobiumveins of urinary bladder
    D. Schistosoma haematobiumleast serious
    E. Schistosoma japonicummild infections, never fatal

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. How are schistosomes unique, compared to other trematodes?
    A.They have separate male and female individuals, and the male is larger
    B. At no stage in their life cycle do they leave the body of the host
    C. Infections are easy to cure by drugs and surgery
    D. They strike the rich and the poor, educated and ignorant, alike
    E. All species must cycle through humans to survive

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The large posterior attachment organ of the adult monogenean is a/an
    A. rhabdite.
    B.  pilidium.
    C.  cirrus.
    D.  hydatid.
    E.  opisthaptor.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Which of the following statements is NOT correct?
    A.Planaria lack a unique larval stage
    B. Planaria ingest food through a mouth located in the anterior region
    C. Flukes have two suckers by which they attach to host tissues
    D. Tapeworms have a scolex with hooks and suckers, by which they attach to the hosts intestinal tissues
    E. Tapeworms can enter the human body through undercooked meat, especially pork, which contains encysted larval forms

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. The long chains of bags of eggs, which hang behind the head of a tapeworm, is called a
    A. strobila.
    B.  cercariae.
    C.  sporocysts.
    D.  scolex.
    E.  hydatid.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The region used for attachment of a tapeworm is called the
    A. proglottid.
    B.  cercaria.
    C.  sporocyst.
    D.  scolex.
    E.  hydatid.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. In tapeworms, the region just behind the scolex where new proglottids are differentiated is the
    A. vitellaria.
    B.  pilidium.
    C.  strobila.
    D.  hydatid.
    E.  germinative zone.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. How could you become infected with adult tapeworms?
    A.Eating insufficiently cooked pork
    B. Being bitten by a mosquito
    C. Ingesting eggs in contaminated water
    D. Eating freshly peeled fruit
    E. All of choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Humans become infected with Taenia saginatus when they
    A. eat poorly cooked fish.
    B.  eat poorly cooked pork.
    C.  eat poorly cooked beef.
    D.  eat unwashed salads.
    E.  All of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. A special cysticercus called a _______ grows slowly but can proliferate thousands of scolices to infect a carnivore.
    A.Hydatid cyst
    B. Pilidium larvae
    C. Cysticercosis
    D. Vitellaria
    E. Rhynchocoel

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. If eggs or proglottids of the pork tapeworm are ingested,
    A. a hydatid cyst may form.
    B.  nothing will form since we have to contract pork tapeworm from eating undercooked pork.
    C.  cysticercosis may occur with resulting blindness or death.
    D.  we may contract more pork tapeworms hanging in our intestine.
    E.  None of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Mesozoans
    A. have two cell layers.
    B.  are flat, plate-like animals.
    C.  gave rise to the sponges.
    D.  have calcareous spicules.
    E.  have two germ layers.

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Ribbon worms and flatworms both have
    A. a flow-through digestive tract.
    B.  flame cells.
    C.  a blood-vascular system.
    D.  an eversible proboscis.
    E.  mostly parasitic lifestyles.

 

Accessibility: Keyboard Navigation
Blooms Level: 4. Analyze
Gradable: automatic
Section: Phylum Acoelomorpha
Section: Phylum Platyhelminthes
Topic: Phylum Acoelomorpha
Topic: Phylum Platyhelminthes


 

  1. Marine forms of ribbon worms have a ciliated larvae that resembles which of the following?
    A.Trochophore
    B. Planula
    C. Miracidium
    D. Gemmule
    E. None of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Acoelomorpha
Topic: Phylum Acoelomorpha

  1. Ribbon worms are
    A. carnivores in most cases.
    B.  nearly all marine dwellers.
    C.  nonparasitic.
    D.  mostly dioecious.
    E.  All of the choices are correct

 

Accessibility: Keyboard Navigation
Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Mesozoa
Topic: Phylum Mesozoa

 

Fill in the Blank Questions

  1. Since flatworms and ribbon worms lack a coelom or a pseudocoel, they are termed _____________ animals.
    acoelomate

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Acoelomorpha
Topic: Phylum Acoelomorpha


 

  1. Because they have three germ layers, flatworms and ribbon worms are _______________.
    triploblastic

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Turbellarians have light-sensitive organs called _______________ or eyespots.
    ocelli

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. If an individual turbellarian contains organs of both sexes, it is termed ______________ or hermaphroditic.
    monoecious

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Trematodes have a body covering known as a ______________.
    tegument

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. Most monogeneans are external parasites of ____________.
    fish

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The posterior attachment organ of monogeneans is the ________________.
    opisthaptor

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The free-swimming, ciliated stage that hatches from a digenetic trematode egg is the _____________.
    miracidium

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. The holdfast of a tapeworm is its _______________.
    scolex

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. The main reproductive body segment of the cestode is called the ____________.
    proglottid

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Taenia solium is a dangerous tapeworm because humans can serve as its ______________ host.
    primary

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Minute, wormlike animals that live as parasites in invertebrates and have two cell layers are the _________________.
    mesozoans

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

  1. Ribbon worms seize their prey with their ________________.
    proboscis

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes


 

  1. Ribbon worms do not regurgitate undigested wastes because their gut ends in an _____________.
    anus

 

Blooms Level: 1. Remember
Gradable: automatic
Section: Phylum Platyhelminthes
Topic: Phylum Platyhelminthes

 

Multiple Choice Questions

  1. Which of the following organisms lives between sand grains and wasnt described until 2000?
    A.

Write a review

Your Name:


Your Review: Note: HTML is not translated!

Rating: Bad           Good

Enter the code in the box below:



 

Once the order is placed, the order will be delivered to your email less than 24 hours, mostly within 4 hours. 

If you have questions, you can contact us here