Biology (MindTap Course List)
Biology (MindTap Course List)
11th Edition
ISBN: 9781337392938
Author: Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg
Publisher: Cengage Learning
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Chapter 31.1, Problem 4C
Summary Introduction

To explain: The ways in which ctenophores are similar to cnidarians.

Introduction: Ctenophores are free-swimming, marine organisms. There are approximately 150 species of ctenophores present. Bioluminescence is well-marked in ctenophores. They possess tissue level of organization and are diploblastic. Body wall of ctenophores consists of three layers, namely outer epidermis, inner gastro-dermis, and middle mesogloea.

The phylum cnidaria comprises of approximately 9000 species. It includes hydra, jellyfishes, sea anemones, corals, and others. Most of them are predominately marine and others are freshwater. The body is composed of only two layers of cells. The body exhibits radial symmetry. Cnidarians possess ‘cnidocytes’.

Summary Introduction

To explain: The ways in which ctenophores are different from cnidarians.

Introduction: Ctenophores are free-swimming, marine organisms. There are approximately 150 species of ctenophores present. Bioluminescence is well-marked in ctenophores. They possess tissue level of organization and are diploblastic. Body wall of ctenophores consists of three layers, namely outer epidermis, inner gastro-dermis, and middle mesogloea.

The phylum cnidaria comprises of approximately 9000 species. It includes hydra, jellyfishes, sea anemones, corals, and others. Most of them are predominately marine and others are freshwater. The body is composed of only two layers of cells. The body exhibits radial symmetry. Cnidarians possess ‘cnidocytes’.

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