The selective advantage of hermaphrodite and environment that favors this process. Introduction: The animals in phylum invertebrates lack vertebral column and include arthropods, mollusks, annelids, and Porifera. The biologist agrees that animals have evolved from a common ancestor of colonial, flagellated protist. The first living choanoflagellate is sponges.

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Chapter 31, Problem 11TYK

Summary Introduction

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The selective advantage of hermaphrodite and environment that favors this process.

Introduction:

The animals in phylum invertebrates lack vertebral column and include arthropods, mollusks, annelids, and Porifera. The biologist agrees that animals have evolved from a common ancestor of colonial, flagellated protist. The first living choanoflagellate is sponges.

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