Outline_Lecture_13

Outline_Lecture_13 - Outline Lecture 13 Origin of the...

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Outline Lecture 13 Origin of the eukaryotes 1. Earliest eukaryotes : Protists!!!! They had an internal membrane and a cell wall. 2. Eukaryotic traits : 1. Multicellularity although a select few were unicellular. 2. Sexual reproduction although some were asexual. 3. Compartmentalization (once again, a select few are not) 3. Origin of the nucleus and endoplasmic reticulum: Cell membrane folds in on itself, increases cell surface, parts can pinch off and bring out things inside (endocytosis) 4. Endosymbiosis (living in close proximity): mitochondria and chloroplasts ---taken into cell by endosymbiosis Protists 1. Protists are not monophyletic: Because they are VERY VERY VERY VERY diverse. 2. Protist traits: Locomotion(psuedopod or flagella), Cell Surfaces (some- plasma membranes, some- use silica to form intricate patterns), Nutrition(photosynthesis- chemotroph or heterotroph), Reproduction(asexual and sexual) 3. Building the bridge to multicellularity: -Eukaryotic cells begin living in close association
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This note was uploaded on 12/09/2009 for the course BIO 200 taught by Professor Herreid during the Spring '07 term at SUNY Buffalo.

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Outline_Lecture_13 - Outline Lecture 13 Origin of the...

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