Chapter 34 – Protostomes
Chapter 34
Protostomes
Multiple Choice Questions
1. Dibenzoylhydrazines are a category of molecules that have been used as insecticides. They
work by blocking ecdysteroid receptors. How does this kill an insect?
Chapter 34 – Protostomes
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o This question addresses ecdysis.
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Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 34 – Protostomes
2. At a celebratory dinner for a recent publication, a marine biologist ordered the lobster claw
appetizer. What part did she order?
3. Which feature is an evolutionary novelty of hexapods?
4. In what way are a human and a crab similar?
Chapter 34 – Protostomes
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Given what you now know, what information and/or problem solving approach is most
likely to produce the correct answer?
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Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 34 – Protostomes
5. Barnacles are sessile filter feeders but unlike bivalves they have internal fertilization. How
do they solve this problem?
6. An entomologist observed a locust sitting on a branch pumping its abdomen like an
accordion. What is the insect most likely doing?
Chapter 34 – Protostomes
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What do you already know about insect respiration?
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likely to produce the correct answer?
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Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 34 – Protostomes
7. Scorpions have a prosoma, pedipalps that are modified into claws, and chelicerae. Which
taxonomic group are they a member of?
8. The lophophore of a brachiopod serves the same function as the __________ in a bivalve.
Chapter 34 – Protostomes
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likely to produce the correct answer?
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Did your problem-solving process lead you to the correct answer? If not, where did the
process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 34 – Protostomes
9. How would an earthworm stretch its body to reach a patch of dirt after crossing a hot
sidewalk?
Chapter 34 – Protostomes
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process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 34 – Protostomes
10. Pinworm is a nematode parasite that lives in the human rectum, and causes itching in the
anal area. What best explains the itching symptom?
Chapter 34 – Protostomes
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process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 34 – Protostomes
11. How could a paleontologist distinguish between a bryozoan fossil and a brachiopod
fossil?
Chapter 34 – Protostomes
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Chapter 34 – Protostomes
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process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
12. What would result if a leech had a mutation causing it to secrete low levels of
anticoagulants?
Chapter 34 – Protostomes
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would soon clot and stop flowing.
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process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
13. Inside its beak an octopus has a rasping tongue that is used to tear apart food. Which
gastropod structure is this analogous to?
Chapter 34 – Protostomes
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process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 34 – Protostomes
14. What is a simple way for determining if an annelid is a polychaete or a clitellate?
Chapter 34 – Protostomes
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unfamiliar situation.
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process break down or lead you astray? How can you revise your approach to produce a
more desirable result?
Chapter 34 – Protostomes
15. Interoctopus communication is facilitated by
16. Humans have direct development, a closed circulatory system, well-developed eyes, and
large brains. Which mollusk also shares these features?