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Features of Evaluation of the Cell - Coursework Example

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The author of this coursework "Features of Evaluation of the Cell" describes main stages of cell evaluation. This paper outlines key aspects of Eukaryotic and Prokaryotic cells, cell organelles, and shows detailed pictures of cells. …
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Features of Evaluation of the Cell
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Download file to see previous pages Prokaryotic cells or organisms containing this type of cell are usually independent as everything required for the survival, movement, and other aspects is present in just that single cell. On the other hand, eukaryotic cells are usually found in multicellular organisms and each set of cells is designed to perform specific functions.
When it comes to the evolution of cells, it is important to look at the origin of cells which has to do with the origin of life, and is one of the most significant steps in the theory of evolution. The birth of the cell can be considered as the transformation from pre-biotic chemistry to biological life. Later the single-celled prokaryotes gave rise to the multicellular eukaryotic organisms. According to the endosymbiotic theory it is certain that DNA-bearing organelles such as the mitochondria and the chloroplasts are what remain of ancient symbiotic oxygen-breathing proteobacteria and cyanobacteria, respectively, where the rest of the cell seems to be derived from an ancestral archaean prokaryote cell (Figure1).
There are also other theories that help us understand the evolution of cells. For instance, sex, as the stereotyped sequence of steps of meiosis and syngamy that persists in almost all extant eukaryotes, may have played a role in the transition from prokaryotes to eukaryotes.
According to the origin of sex as vaccination theory, the eukaryote genome accreted from prokaryan parasite genomes in numerous rounds of lateral gene transfer. Sex-as-syngamy basically came up when infected hosts began transaction nuclearised genomes containing coevolved, vertically transmitted symbionts that conveyed protection against horizontal infection by more virulent symbionts (Sterrer, 2002). In fact the evolution of modern cells is perhaps the most challenging and important problem for the biologists (Brenner, 1998). Scientific curiosity in cellular evolution accelerated when the universal phylogenetic tree was determined (Zillig, et al., 1989). However only after the emergence of microbial genomics that biologists could really do much about the problem of cellular evolution. ...Download file to see next pagesRead More
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