BIOL 2201 Chapter Notes - Chapter 1,2,5,6,7: Deoxyribonucleoside, Amine, Central Dogma Of Molecular Biology
26 Oct 2017
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Cells are enormously diverse in their chemical requirements because some require oxygen to live whereas to others gas is deadly. Difference in size, shape and some chemical requirements often reflect differences in cell function. Some cells are specialized factories for the production of particular substances such as hormones, fat, starch, latex. Some modifications specialize a cell so much that they spoil its chances for leaving any descendants. Such a specialization would be senseless for a cell that lived a solitary life. In a multicellular organism, there is a division of labour among cells which allows some cells to become specialized to an extreme degree for tasks and leaving them dependent on their fellow cells for many basic requirements. Mutations can create offspring that are changed for the worse, changed for the better, or change in an equal way the struggle for survival eliminates the first, favours the second and tolerates the third.
