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Chapter 33

Chapter 33

Chapter 33. Invertebrates. Quick Notes. Overview: Life Without a Backbone. Invertebrates are animals that lack a backbone They account for 95% of known animal species. LE 33-2. Cnidaria. Echinodermata. Chordata. Porifera. Other bilaterians (including Nematoda, Arthropoda,

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1.97k views • 179 slides
Chapter 33

Chapter 33

Chapter 33. Invertebrates. Overview: Life Without a Backbone. Invertebrates are animals that lack a backbone They account for 95% of known animal species. LE 33-2. Cnidaria. Echinodermata. Chordata. Porifera. Other bilaterians (including Nematoda, Arthropoda, Mollusca, and Annelida).

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1.78k views • 155 slides
Chapter 33

Chapter 33

Chapter 33. Invertebrates. Overview: Life Without a Backbone. Invertebrates are animals that lack a backbone They account for 95% of known animal species. Fig. 33-2. Calcarea and Silicea. ANCESTRAL PROTIST. Cnidaria. Lophotrochozoa. Common ancestor of all animals. Eumetazoa.

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Prof. Stuart Bunt

Prof. Stuart Bunt

Evolution of the Brain. Prof. Stuart Bunt. Humans are only one animal. Much of our knowledge of the development of the brain comes from study of other animals Caenorhabditis elegans for cell lineages and genetics Drosophila for genetics Xenopus laevis for vertebrate embryology

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The Simplest Animals

The Simplest Animals

The Simplest Animals. Phylum Porifera. Invertebrates Animals without tissues (Sponges) All are aquatic and sessile (stay in one place) The body plan is asymmetrical Made of a loose arrangement of cells with no defined cell layer. Sponges!. Sponges.

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