BILD 3 Lecture Notes - Lecture 14: Mixotroph, Nuclear Membrane, Euglena
Document Summary
Bacteria examples and some characteristics: chlamydias, e. g. pathogens causing chlamydia, cyanobacteria (possible origin of chloroplasts, gram-positive, e. g. , aquatic & photosynthetic, e. g. , pathogens causing lyme disease and syphilis. Archaea examples: extremophiles are well represented in this group, halophiles live in highly saline environments, thermophiles live in extremely hot environments, methanogens live in anoxic environments, e. g. , halococcus, e. g. , sulfolobus. Examples of unicellular protists: giardia is an intestinal parasite that persists in water as dormant cysts. Incorporation of silica makes diatoms difficult to consume. 1: major component of plankton in lakes and oceans, diverse: > 100,000 species, fossilized diatoms make up diatomaceous earth. Advantages and challenges of land colonization: advantage, abundant co 2, abundant light, nutrients more plentiful. Initially no herbivores: disadvantage, relative scarcity of water, lack of structural support, herbivores eventually, shared, derived features of land plants reflect differences between occupying aquatic versus terrestrial environments.
