no sunlight, life is weird and wonderful, organisms often eat @marine snow@
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What is 'marine snow'?
debri from rocks and organisms like plankton
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What zones in deep sea have x100,000 organism density? Include example of organism.
Hydrothermal Vents, e.g. Chemoautotrophic bacteria, use sulphur produce organic materials, form thick mats, food for other organisms
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Outline Theory 'How did Life Start?'
1) Monomers made by non living molecules (Abiotic synthesis) 2) monomers-->polymers 3)Self replicating molecules --> proteins 4) packaging into protobionts (very simple cells) maintain environment properties life (metabolism)
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Where did organic molecules come from? (2)
Terrestrial- synth by impact shock/energy (UV, HEAT) Extra-terrestrial- interstellar dust down on earth (LHB)
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What is LUCA?
Last Universal Common Ancestor, 3.6 billion, single celled, complete blue prints DNA rep-Protein Syn-RNA Transcription
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What happened after LUCA?
1) first photosynthetic life (cyanobacteria, blue algae) O2 in atmosphere 2) O2 evolution and diversification of animals require O2
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Other cards in this set
Card 2
Front
Outline 3 factors of the Hadean Eon.
Back
1) 4.6 billion years ago 2) severe volcanism, very hot 3) liquid water 4.4 billion
Card 3
Front
Outline 5 factors of Archean Eon.
Back
Card 4
Front
Outline the importance of Canadian Sedimentary Rocks.
Back
Card 5
Front
Outline the importance of Greenland discovered rocks.
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