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Changes In The Atmosphere Causing Multicellularity
Beginning of paper
About 2.5 billion years ago, oxygen began slowly to accumulate in the
atmosphere, as a result of the photosynthetic activity of the cyanobacteria.
Those prokaryotes that were able to use oxygen in ATP production gained a strong
advantage, and so they began to prosper and increase. Some of these cells may
have evolved into modern forms of aerobic ....
Middle of paper
....usive, meaning one or the other could account for
different parts of eukaryotic cells. The endosymbiotic theory states that the
formation of eukaryotic cells were symbiotic associations of prokaryotic cells
living inside larger prokaryotes. The endosymbiotic hypothesis accounts for the
presence in eukaryotic cells of complex organelles not found .... |
| Word count: 471 |
Page count: 2 |
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