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


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
In many ways, plant cells are similar to other eukaryotic cells. They have (usually just) one nucleus, organelles, a plasma membrane, and (almost all of them) share connections to adjacent cells. Cell walls and chloroplasts are the major plant cell distinctive features (Bowes, 1996)....
4 pages (1004 words) Essay
Genetics and Evolution
Thus in such situations the characters used to recognise the species becomes merely diagnostic, not distinctive. Biologically speaking, these are a connected series of the species in neighbouring areas which interbreed with two end populations which are too phenotypically and geographically separated that they cannot interbreed. These two genetically and phenotypically diverse populations which represent the end populations may exist in the same geographic region, yet due to genetic and phenotypic diversity would not interbreed. As an example, the case of Larus gulls can be taken, the...
10 pages (2510 words) Essay
Theory of Endosymbiosis
As they became more interdependent an obligatory symbiosis evolved." (Margulis, Live Chat, n.p.)...
4 pages (1004 words) Essay
Cellular Microbiology
(Institute of Materials, Great Britain, P. 223) The importance is far reaching, from environmental O2 /CO2 balance to the synthesis of artificial herbicides that act on unwanted herbs by blocking some important steps in this energy producing process. The chlorophyll pigment alone has lead to new avenues for thoughts and research on the importance of photosynthetic processes and has paved the way for the synthesis of certain medicinal drugs exploiting its photoprotective mechanisms for preventing light induced damage of cells. The chlorophyll research has added to the significance of this novel...
8 pages (2008 words) Essay
Stem Cell Research
It is nobody's case that stem cell research is a bad thing. Each one of us hopes for a day when no disease will be categorized as incurable', and the potential in this line of work to realize that dream is plain for all to see. The controversy that stem cell research has provoked - sharply dividing public opinion and placing the government and President Bush in a quandary - has to do with an ethical concern over the use of embryos....
3 pages (753 words) Essay
Single Cell Protein
Although, there is a global shortage of protein, the shortage is in developing countries which cannot afford this technology....
4 pages (1004 words) Essay
Got a tricky question? Receive an answer from students like you! Try us!