Chapter 34 – Protostomes
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Reflect on Process
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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
17. A snail in your garden and an oyster are quite different in appearance. What would be
evidence to justify grouping them together?
Chapter 34 – Protostomes
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•
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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
Chapter 34 – Protostomes
18. If a hiker picked up a mollusk on a trail in a rain forest, what class would it belong to?
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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
19. What change would result for a land snail that had a mutation interfering with chitin
formation?
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
Chapter 34 – Protostomes
20. Paramecia use cilia for locomotion and for gathering organic matter. How are rotifers
similar?
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Chapter 34 – Protostomes
21. Turbellarian flatworms have a distinct head. When compared to the head of an insect,
what is the flatworm head missing? rev: 05_14_2014_QC_49568
22. Why doesn’t a tapeworm have a mouth on its scolex?
Chapter 34 – Protostomes
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Chapter 34 – Protostomes
23. According to the modern classification scheme, which animal would be a spider’s closest
relative?
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Chapter 34 – Protostomes
Fill in the Blank Questions
24. A _________ is a circular or U-shaped ridge around the mouth, bearing either one or two
rows of ciliated, hollow tentacles.
25. Brachiopods develop as protostomes, but they show ______ cleavage.
26. In their basic body plan, mollusks have a visceral mass covered with a soft epithelium and
a muscular ____ that is used in locomotion.
Chapter 34 – Protostomes
27. The molluscan class ________ includes the snails and slugs.
28. Members of the class _______, which include octopuses, squids, and nautiluses, are
highly intelligent.
29. Annelids are characterized by serial ________.
30. The evolution of jointed appendages has made __________ very successful.
Chapter 34 – Protostomes
31. In many arthropods, body segments have become fused into functional groups called
_____.
Multiple Choice Questions
32. The phylum that includes snails, clams, oysters, and octopuses is the
33. In mollusks, the folds of tissue that arise from the dorsal body wall and enclose a cavity
surrounding the visceral mass are called the
Chapter 34 – Protostomes
34. Many marine mollusks have distinctive larvae which have their bodies encircled by a row
of cilia. These larvae are called
35. The organ that is responsible for secreting cocoons in the oligochaetes is known as the
36. The phyla Bryozoa and Brachiopoda have which feature in common?
Chapter 34 – Protostomes
37. Examples of mollusks that live on land are the
38. Squids and octopuses move by means of water movement through their
39. The rasping tongue, the radula, is present in which molluscan group?