Chapter 5

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Chapter 33
Invertebrates
Active Lecture Questions for use with Classroom Response Systems
Biology, Seventh Edition
Neil Campbell and Jane Reece
Edited by William Wischusen, Louisiana State University
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
1. While sampling marine plankton, a student encounters large
numbers of eggs in her samples. She rears some of the eggs in
the laboratory for further study and finds that the blastopore
becomes the mouth in a complete digestive system. The
embryo develops into a trochophore larva and eventually has a
coelom and open circulation. These eggs belonged to a(n)
1) annelid.
2) echinoderm.
3) mollusk.
4) nemertean.
5) arthropod.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
2. A species of terrestrial animal is discovered with the
following characteristics: exoskeleton; tracheal system for
gas exchange; modified segmentation. A knowledgeable
zoologist would predict that its adults probably also would
have *
1) eight legs.
2) a water vascular system.
3) a sessile lifestyle.
4) wings.
5) parapodia.
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
Below is a proposed phylogeny for major clades of the animal
kingdom, with several of the lineages labeled (A-E).
Responses may be used once, more than once, or not at all.
3. The ancestors of which clades possessed a true
coelom?
1) A and B only
2) C and D only
3) C, D, and E
4) B, C, D, and E
5) all of these
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
4. Which clade(s) possess(es) species whose
members display at least some degree of
segmentation?
1) A only
2) B only
3) C and D
4) C, D, and E
5) all of these
Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings
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