Sept 11-08 - Eukaryotes Lecture -

Sept 11-08 - Eukaryotes Lecture - - Josh Bovard Biology 111...

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Josh Bovard Biology 111 – Thursday, September 11 th , 2008 Professor Graham Bell D IVERSITY AND B ACTERIA Eukaryotes : ~1-2 billion years old Almost all eukaryotes contain mitochondria and/or chlorophyll Mitochondria probably evolved from endosymbiosis Because eukaryotes have a cytoskeleton and the ability to change shape, they are able to develop motility inside and outside of the cell Can also perform phagocytosis Bacteria cannot take up this way of life because of their cell wall to eat other organisms, the bacteria must go into the cell and work outward; they are unable to engulf and digest Endosymbiosis is a process where one cell ‘swallows’ another cell (specifically prokaryote) and ends up living together instead of digesting it (form partnership) this is the process that created mitochondria and chloroplasts evidence is shown in the double-cell membrane around mitochondria genes in mitochondria that match bcacterial genes target sequence DNA of nuclear genes targeted for the chloroplast match a protein on the membrane of bacteria
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Sept 11-08 - Eukaryotes Lecture - - Josh Bovard Biology 111...

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