The Evolution of the Eukaryotic Cell - Essay Example

Only on StudentShare

Extract of sample
The Evolution of the Eukaryotic Cell

This theory maintains that advantageous mutations, which enabled organisms to survive with oxygen in the atmosphere, were the basis for evolutionary change in prokaryotes. (Conduah, 2005).
The second theory, referred to as the "botanical myth" by Lynn Margulis states that primitive photosynthetic bacteria evolved gradually into algae and plants, and some of these lost photosynthetic competence and evolved into fungi and animals. Due to the abundance of oxygen in the atmosphere, the fungi and animals evolved mitochondria, which utilize oxygen instead of light, as the energy producing organelle. (Conduah, 2005).
The third theory of serial endosymbiosis relies on symbiogenesis, or long term symbiotic relationships between different species that lead to new forms of life states the following: blue green algae produced oxygen as a by-product of photosynthesis, allowing oxygen to buildup in the atmosphere; other bacteria, prokaryotic cells, developed and grew, some of them with aerobic capabilities; anaerobic, heterotrophic cells known as proto- eukaryotes, ingested these aerobes and developed a mutually beneficial relationship. ...
Download paper

Summary

In the Proterozoic Era, 2.5 billion to 544 million years ago, the atmospheric level of oxygen increased to 15% due to oxygen producing cyanobacteria. The levels of oxygen in the atmosphere produced a fatal environment in which anaerobic organisms needed to evolve methods of coping with the presence of oxygen…
Author : miracle61

Related Essays

Cell Components
4 pages (1004 words) Essay
Genetics and Evolution
10 pages (2510 words) Essay
Theory of Endosymbiosis
4 pages (1004 words) Essay
Cellular Microbiology
8 pages (2008 words) Essay
Stem Cell Research
3 pages (753 words) Essay
Single Cell Protein
4 pages (1004 words) Essay
Got a tricky question? Receive an answer from students like you! Try us!