Animal evolution - PowerPoint PPT Presentation

Introduction To Animal Evolution

Introduction To Animal Evolution. Chapter 32. Animals 1 st appeared in Precambrian in waters, spread to land. 5 criteria that define animal: 1 Animals multicellular, must get food through ingesting other organisms or organic material.

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Arthropods: The first Animals to have Jointed Appendages

Arthropods: The first Animals to have Jointed Appendages. What is an Arthropod?. Arthropods: The first Animals to have Jointed Appendages. Over the course of animal evolution, a number of changes in the coelomate body plan led to the evolution of animals with even greater complexity.

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Chapter 32

Chapter 32. 0. Introduction to Animal Evolution. According to the grade-based animal phylogeny, the acoelomate condition is primitive and the acoelomates branched off before the origin of the coelom. is the first branch point, separating the acoelomates from the eumetazoa.

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293 views • 8 slides

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