Mader's Concepts in Biology, First Edition

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Sylvia S. Mader

Chapter 19

Question 1

Which of the following is not a beneficial role that bats have in an ecosystem and for humans?

A. they feed on insectsB. they help pollinate flowersC. their blood is used to treat human diseasesD. they help disperse seedsE. they produce a powerful anticoagulant used

in medicine

Question 2

All of the following are animal characteristics except:

A. they are chemoheterotrophsB. they are multicellular and unicellularC. they undergo developmental stages that

produce specialized tissues and organsD. they usually reproduce sexuallyE. they have muscles and nerves which give

them movement and coordination

Question 3

If a biologist was studying the hypothesis of animal origins which suggests that animals arose from ciliated protists in stages, he or she would be studying which of the following?

A. the colonial flagellate hypothesis

B. the cephalization hypothesis

C. the eucoelomate hypothesis

D. the multinucleate hypothesis

E. the segmentation hypothesis

Question 4

The hypothesis of animal origins which states that animals are descended from an ancestor which resembled a hollow, spherical colony of flagellated cells is referred to as:

A. the eucoelmate hypothesis

B. the cephalization hypothesis

C. the colonial flagellate hypothesis

D. the multinucleate hypothesis

E. the segmentation hypothesis

Question 5

From earliest to latest, which is the correct order of the significant evolutionary innovations in the evolutionary tree of animals?

A. true tissue germ layers, multicellular, bilateral symmetry, eucoelom, body cavity, segmentation, jointed limbs

B. bilateral symmetry, true tissue germ layers, multicellular, body cavity, eucoelom, segmentation, jointed limbs

C. body cavity, bilateral symmetry, true tissue germ layers, multicellular, eucoelom, jointed limbs segmentation

D. multicellular, body cavity, true tissue germ layers, bilateral symmetry, jointed limbs segmentation, eucoelom

E. multicellular, true tissue germ layers, bilateral symmetry, body cavity, eucoelom, segmentation, jointed limbs

Question 6

Animals which have definite right and left halves are said to have:

A. radial symmetry

B. spherical symmetry

C. bilateral symmetry

D. trilateral symmetry

E. asymmetrical symmetry

Question 7

A localization of a brain and specialized sensory organs in the anterior end of the animal’s "head" is called:

A. bilateral symmetry

B. segmentation

C. homology

D. cephalization

E. eucoelomate

Question 8

If you were a scientist studying organisms that have their body cavity incompletely lined with mesoderm, you would be studying which type of organisms?

A. eucoelomatesB. pseudocoelomatesC. segmentedD. protostomesE. acoelomates

Question 9

The more closely related two organisms are the fewer nucleotide sequences they will have in common.

A. true

B. false

Question 10

Traditional classification relies on which of the following methodologies?

A. molecular systematics

B. genomic systematics

C. proteomic systematics

D. cladistic systematics

E. evolutionary systematics

Question 11

Humans belong to which of the following phylum?

A. Mammalia

B. Primates

C. Chordata

D. Animalia

E. Eukarya

Question 12

Which of the following is not a characteristic of sponges?

A. water enters through a single cavity, the osculum

B. flagellated collar cells move water

C. they are sessile filter feeders

D. they reproduce sexually and asexually

E. they have flagellated larva

Question 13

If the cells of a sponge are mechanically separated by a coarse cloth bag, the cells then:

A. reproduce sexually

B. die from being separated

C. form spicules in the pattern of the cloth

D. go back to primitive cells and soon differentiate

E. reassemble into a new organized sponge with each cell resuming its original job

Question 14

A biologist is studying stinging cells called nematocysts. Which of the following organisms would he or she be studying?

A. sponges

B. flatworms

C. roundworms

D. cnidarians

E. snails

Question 15

Cnidarians have all of the following characteristics except:

A. they have radial symmetry

B. they have three germ layers

C. they have two body forms: polyp and medusa

D. they capture their prey

E. they live in salt and fresh water

Question 16

Which of the following terms would not be associated with flatworms?

A. bilateral symmetry

B. cephalization

C. sessile

D. hermaphrodite

E. acoelomate

Question 17

If you were infected with a tapeworm, you would have this type of worm inside you:

A. a flatworm

B. a fluke

C. a roundworm

D. oligochaete

E. polychaete

Question 18

The __________ of the tapeworm contains both male and female sex organs and becomes filled with developing embryos.

A. proglottids

B. scolex

C. cyst

D. gastrovascular cavity

E. nematocyst

Question 19

Which of the following is not a reason why flatworms make excellent internal parasites?

A. they are small

B. they have a large absorptive surface area

C. they are hermaphroditic

D. they have an excellent sensory system

E. they produce many offspring

Question 20

Which of the following is a trait which is found in roundworms but not found in flatworms?

A. two germ layers

B. multicellular

C. bilateral symmetry

D. they can be parasitic

E. a complete digestive system

Answer Key – Chapter 191. C2. B3. D4. C5. E6. C7. D8. B9. B10. E

1. C2. A3. E4. D5. B6. C7. A8. A9. D10. E