Biology
Biology
12th Edition
ISBN: 9780078024269
Author: Sylvia Mader, Michael Windelspecht
Publisher: McGraw-Hill Education
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Chapter 32, Problem 1A

Whichanimals lack a truecircularory system?
a. cnidarians c. nematodes
b. flatworms d. All of these are correct.

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Which animals lack a true circulatory system?a. cnidarians c. nematodesb. flatworms d. All of these are correct.
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A ciliated epidermis persists in the mature form of a flatworm belonging to which class?    a. Turbellaria b. Monogenea c. Trematoda d. Cestoda
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