The Sponge Body Plan Is Characterized By

1. The body plan of an animal is a. its general structure.

b. the integrated functioning of its parts.

c. its general structure and the integrated functioning of its parts.

d. its general structure and its evolutionary history.

e. the integrated functioning of its parts and its evolutionary history.

2. A bilaterally symmetrical animal can be divided into mirror images by a. any plane through the midline of its body.

b. any plane from its anterior to its posterior end.

c. any plane from its dorsal to its ventral surface.

d. any plane through the midline of its body from its anterior to its posterior end.

e. a single plane through the midline of its body from its dorsal to its ventral surface.

3. Among protostomes, cleavage of the fertilized egg is a. delayed while the egg continues to mature.

b. always radial.

c. spiral in some species and radial in others.

d. triploblastic.

e. diploblastic.

4. The sponge body plan is characterized by a. a mouth and digestive cavity but no muscles or nerves.

b. muscles and nerves but no mouth or digestive cavity.

c. a mouth, digestive cavity, and spicules.

d. muscles and spicules but no digestive cavity or nerves.

e. no mouth, digestive cavity, muscles, or nerves.

5. Which are phyla of diploblastic animals?

a. Porifera and Cnidaria b. Cnidaria and Ctenophora c. Cnidaria and Platyhelminthes d. Ctenophora and Platyhelminthes e. Porifera and Ctenophora

6. Cnidarians have the ability to a. live in both salt and fresh water.

b. move rapidly in the water column.

c. capture and consume large numbers of small prey.

d. survive where food is scarce, because of their low metabolic rate.

e. capture large prey and to move rapidly.

7. Many parasites evolved complex life cycles because a. they are too simple to disperse readily.

b. they are poor at recognizing new hosts.

c. they were driven to it by host defenses d. complex life cycles increase the probability of a parasite's transfer to a new host.

e. their ancestors had complex life cycles and they simply retained them.

8. Members of which phyla have lophophores?

a. Phoronida, Brachiopoda, and Nemertea b. Phoronida, Brachiopoda, and Ectoprocta c. Brachiopoda, Ectoprocta, and Platyhelminthes d. Phoronida, Rotifera, and Ectoprocta e. Rotifera, Ectoprocta, and Brachiopoda

9. Which of the following is not part of the molluscan body plan?

a. Mantle b. Foot c. Radula d. Visceral mass e. Jointed skeleton

10. Cephalopods control their buoyancy by a. adjusting salt concentrations in their blood.

b. forcibly expelling water from the mantle.

c. pumping water in and out of internal chambers.

d. using the complex sense organs in their heads.

e. swimming rapidly.

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Responses

  • PETER AMBROSE
    Which of the following is not part of the molluscan body plan?
    8 years ago
  • selam
    Which of the following is not a characteristic of the sponge body plan?
    8 years ago
  • Rosa
    What is d body plan of a sponges?
    8 years ago

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