1. Copyright © 2005 Pearson Education, Inc. publishing as Benjamin Cummings Active Lecture Questions for use with Classroom Response Systems Biology, Seventh Edition Neil Campbell and Jane Reece Edited by William Wischusen, Louisiana State University Chapter 33 Invertebrates

2. 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.

3. 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.

4. 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

5. 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