On Being the Right Size and In the Right Place Don Reeder Fall 151PLATO or Location, Location, Location.

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Presentation transcript:

On Being the Right Size and In the Right Place Don Reeder Fall 151PLATO or Location, Location, Location

Genetics Fall 152PLATO Science 311(5765): First RNA life?

Multicells Fall 15PLATO3 >46 tries for complexity some few bacteria mostly unsuccessful many times for green algae and land plants couple of times for animals once for brown algae three times for fungi a few times for slime molds and red algae

How? Fall 15PLATO4 Cellurization: (needs example) Unicellular organism developed multiple nuclei, then could have made membranes around each of them. Symbiosis: (rare) combination of different unicellular species with different function became dependent on each other but replicated independently Colonial theory: (currently favored) Symbiosis of cells of the same species Cells fail to separate after division Advantages: larger size; specialization; longer life Problems: back to unicell; cancer, need more food

Timeline Fall 15PLATO5 Arc of Evolution

Cambrian Explosion Fall 156PLATO Science 341 (1355)

Terrestrial Ecological Niches Fall 157PLATO

Acquatic Biomes Fall 158PLATO Ponds and Lakes Streams and Rivers Wetlands Freshwater Marine Oceans Coral Reefs Esturaries

Relationships Fall 159PLATO Predators Competitors Parasites Synergistic/cooperative/social Modulated by local environment. Beyond adapting to geography