BIO 200 Lecture Notes - Lecture 13: Alveolate, Heterokont, Giardia Lamblia
10 Nov 2017
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Eukaryotes: eukaryotes arise about 1. 7 billion years ago, eukaryote traits: Increased speed of adaptation -> successful: multicellularity allows for flexibility. Sexual reproduction leads to increased genetic diversity: sexual reproduction, compartmentalization. Eukaryotic cells have organelles -> carry out independent functions within the cell -> developed so that the origin of the cell require multiple steps. Mitochondria formed through endosymbiosis with a proteobacterium -> 9) Protists are highly paraphyletic -> mrca of protists = mrca of eukaryotes -> protists, housing all eukaryotes we don"t know a lot about. Protists bring up issues with traditional classifications -> bright colors are kingdoms. > tips are phylums : variation in protist traits reveal the lack of unity in this group, locomotion move via flagella, cilia, or pseudopodia. Pseudopods reach out and adhere to adjacent surface -> protist rolls itself: cell surfaces. Extracellular material to protect the surface: nutrition.
