Important_Concepts_Animal_Diversity - Important Concepts...

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SLIDE 25! Animals I. The Invertebrates A. The evolution of animals 1. their ancestors 2. the diversity of life Increase in diversity because of: Higher oxygen levels Predator-prey interactions Greater diversity of plants Extinction Gene complexes 3. taxonomic group that is most identified in terms of number 95% Invertebrate 4. Evo-Devo and “Hox genes” Evo-Devo: Compares developmental processes of organisms to determine ancestral relationship and to discover evolution of development process. Hox Genes: Used to regulate creation of specific tissues in metazoans B. Characteristics of animals 1. traits Mobile: have nervous and muscle tissue Heterotrophic: Must obtain carbon and cannot produce own food. Sexually reproducing Diploid: 2n Multi-cellular Embryonic Development (Zygote → Blastula → Gastula) Hox Genes (Changes in regulation produce different structures) 2. how to distinguish from other kingdoms Monophyletic: Shared derived characteristics 3. embryo development (germ layers) C. Body plans 1. tissues, metazoans/parazoa/eumetazoans Metazoans: Bodies composed of different tissues. Internal digestive chamber. Parazoa: Have differentiated cells, but no tissue Eumetazoans: True tissues organized into germ layers. 2. body cavities (advantages of? Types?) Coelomates: Have a coelom with a lining of peritoneum from mesoderm. Include all vertebrates and protect organs, while letting them grow and move freely. PsuedoCoelomates: Similar to Coelomates, except organs are not well organized. Acoelomates: No coelem 3. protostome/deuterstome Protostomes: Anus develops in mouth
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Deuterostomes: Anus develops in blastopore. 4. Bilateral, Radial D. The phyla we covered in class: know what animals they include, the characteristics of each, and the special terms associated with each 1. Porifera: choanocytes, amoebocytes, spicules No true tissues Asymmetrical Sometimes have hard shell Filter Feeders Collar cells in choanocytes 2. Cnidaria: cnidocytes, nematocysts, tentacles, medusa, polyp
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Important_Concepts_Animal_Diversity - Important Concepts...

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