BIOL10005 Lecture Notes - Lecture 19: Phylogenetic Tree, Micronucleus, Choanocyte
1 Oct 2018
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Genetics and evolution - lecture 19 - week 2. Ciliates: unicellular, diverse and complex, covered with agella called cilia (beat and bring in water, enabling them to extract water etc, two types of nuclei: micro and micronucleus, predatory: feed on bacteria, protists and other ciliates, example: paramecium. Amoebae: found in many eukaryotic lineages, protistan amoebae do not form a single lineage, cells move by bulging its cytoplasm into pseudopods, feed by engul ng prey by phagocytosis. Chanoflagellates: collar agellates or sponge like protists, aquatic habitats, tiny, unicellular protists closely related to choanocytes of sponges, at the base of the phylogenetic tree that gave rise to the animals, heterotrophic consumers. Amoebic protists: heterotrophs: absorb or engulf food after external digestion (like fungi, major decomposers and recyclers, reproduce by spores in fruiting bodies called sorocarps. Monday, 1 october 2018: cellular slime moulds feed on bacteria and decaying organics, acellular slime moulds are decomposers.
