Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 32.4, Problem 1CC
Summary Introduction
To describe: The evidence that cnidarians share a more recent common ancestor with other animals than with sponges.
Concept introduction: Sponges belong to a phylum called porifera. They have cellular level of organization that is their body is made up aggregates of cells. They have pores in their whole body. These pores help in exchange of nutrient and also remove waste materials. Sponges are primitive animals that diverged from other animals early in the evolution. Certain recent studies have concluded that the sponges are monophyletic.
Cnidaria is a phylum that contains approximately 10,000 species of animals. The animals in this group are usually aquatic (freshwater and marine). They possess a specialized cell called cnidocyte. The cnidocyte helps in capturing prey. The cnidarians are radially symmetrical and have tissue level of organization.
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Chapter 32 Solutions
Campbell Biology
Ch. 32.1 - Summarize the main stages of animal development....Ch. 32.1 - WHAT IF? What animal characteristics would be...Ch. 32.2 - Put the following milestones in animal evolution...Ch. 32.2 - VISUAL SKILLS Explain what is represented by the...Ch. 32.2 - MAKE CONNECTIONS Evaluate whether the origin of...Ch. 32.3 - Compare three aspects of the early development of...Ch. 32.3 - Prob. 2CCCh. 32.3 - Prob. 3CCCh. 32.4 - Prob. 1CCCh. 32.4 - WHAT IF? Suppose ctenophores are basal metazoans...
Ch. 32.4 - Prob. 3CCCh. 32 - Prob. 32.1CRCh. 32 - What caused ihe Cambrian exploston? Describe...Ch. 32 - Describe how body plans provide useful Information...Ch. 32 - Prob. 32.4CRCh. 32 - Prob. 1TYUCh. 32 - The distinction between sponges and other animal...Ch. 32 - Prob. 3TYUCh. 32 - Prob. 4TYUCh. 32 - EVOLUTION CONNECTION A professor begins a lecture...Ch. 32 - WRITE ABOUT A THEME: INTERACTIONS Animal life...Ch. 32 - SYNTHESIZE YOUR KNOWLEDGE This organism is an...
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