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Lecture 5 Animal Evolution – The Invertebrates

Lecture 5 Animal Evolution – The Invertebrates. 1. Sponges-success in simplicity. No symmetry, tissues/organs Abundant from the early earth. Inhabitants of freshwater/coastal regions. Sizes vary from very large to tiny ones Home to worms, shrimps & many small animals.

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Lecture 5 Animal Evolution – The Invertebrates

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  1. Lecture 5Animal Evolution – The Invertebrates

  2. 1. Sponges-success in simplicity • No symmetry, tissues/organs • Abundant from the early earth. • Inhabitants of freshwater/coastal regions. • Sizes vary from very large to tiny ones • Home to worms, shrimps & many small animals. • Several shapes-flattened, sprawling, lobed, compact, tubelike, vaselike. • Filter feeders

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