Lec31_handout - BioG1780 Evolution and Biodiversity Lectures 31 Fall 2010 Todays lecturer Harry Greene 1 AnimalsOut of the soup body plans and the

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BioG1780 Fall 2010 Evolution and Biodiversity Today’s lecturer: Harry Greene Lectures 31: November 12, 2010 1. Animals—Out of the soup: body plans and the hole that matters. With this and remaining biodiversity lectures we explore the remarkable adaptive radiation of animals, as well as certain other closely related and fascinating eukaryotes. In terms this lecture, first review pp. 583-585 in Ch. 27 of Sadava et al. regarding basal lineages of Unikonts, then read Ch. 31 on the rise of animals. 2. What are Unikonts, Opisthoconts, and Animals? As is the case for Plantae, the lineages basal to fungi and animals are relatively simple and retain shared primitive features (NB: what is the technical general term for such attributes?) with more basal eukaryotes. Uniconts have a single flagellum and consist of opithoconts (fungi, choanoflagellates, and animals) and amoebozoans (the loboseans or amoebae and the slime molds). Relatively basal fungi (like chytrids), choanoflagellates, sponges, and amoebozoans are all unicellular or relatively simple multicellular organisms, and thus also like most other relatively basal eukaryotes. Indeed, we can now look back at the basic eukaryote TOL and observed repeated, independent “descent with modification” resulting in increasing complexity (e.g., in
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This note was uploaded on 12/29/2010 for the course BIOEE 1780 at Cornell University (Engineering School).

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Lec31_handout - BioG1780 Evolution and Biodiversity Lectures 31 Fall 2010 Todays lecturer Harry Greene 1 AnimalsOut of the soup body plans and the

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