Biology notes April 1 - Prokaryotic Cell: no organelles....

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bio notes April 1, 2008 “Evolution” How did the first living cell come into existence? every culture has its own creation story. science isn’t really equipped to test whether god exists. FIVE POSSIBLE STEPS IN THE EMERGENCE OF LIVING CELLS AS BEST WE CAN TELL THE WORLD IS ABOUT 4.5 BILLION YEARS OLD. AS BEST WE CAN TELL THE FIRST LIVING CELL APPEARED 3.8 BILLION YEARS AGO. 1. Polymers (biological molecules) form. (Stanley miller experiment) 2. self-replication evolves.
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3. molecular interactions take place. 4. cell-like compartments take shape. 5. coordinated cell-like activities emerge.
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Unformatted text preview: Prokaryotic Cell: no organelles. Eukaryotic Cell: organelles. How did we go from prokaryotes to eukaryotes? there is cell life that hints at the idea of moving from broad infolding of a membrane within the cell, to a more pinched off membrane which creates organelles. endocytosis CHLOROPLAST: ultimately makes food on the planet. a double membrane organelle. Endosymbiotic hypothesis: membrane bound organelles came from free-living organisms. Most scientists believe that you cant have multi-cellular life until aerobic life could sustain itself....
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This note was uploaded on 04/14/2008 for the course BIO 107 taught by Professor Atkinson during the Spring '08 term at Christopher Newport University.

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Biology notes April 1 - Prokaryotic Cell: no organelles....

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