MICR 2420 Lecture Notes - Lecture 5: Contractile Vacuole, Sargassum, Fuligo Septica
4 Mar 2016
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Eukaryoic diversity is profound: widest diversity in form and size in the tree of life. How do we classify such a diverse group of organisms? o o o o o. Their metabolism is not as complex as prokaryotes. All eukaryotes descended from an ancestral cell that engulfed a bacterial endosymbiont. All phototrophic eukaryotes descended from an ancestral cell that addiionally engulfed the bacterial ancestor of chloroplasts. Thus most eukaryotes conduct oxygenic photosynthesis, or heterotrophy or both. Sequencing eukaryoic genomes is more challenging than prokaryoic genome. Where do animals (metazoa) it into the eukaryoic tree o o o o. Look for a gene deleion or inserion unique to one clade. Baldauf et al found a stretch of dna encoding 12 aa present in animals and fungi (absent in plants/proists) Animals and fungi it into one clade the opisthokonts. Why do we care who our closest non-animal relaives are? o o. They can be used as models to answer key quesions.
