Answers

2015-01-21T17:25:19+05:30
1.the differences in the traits among the individuals of a species is called variation. 2. Due to creation of variations, a species can adjust to the changing environment around it. And this promotes the survival of the species in the changing environment. For eg, the accumulation of 'heat resistance' variation in some bacteria will ensure its survival even when the temperature in its environment rises too much due to a heat wave or some other reasons. On the other hand, the bacteria which don't have this variation to withstand heat would not survive under these circumstance and die.
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2015-01-25T19:36:16+05:30
Define variation in context of development of species?why is tendency of variation during reprodution is beneficial for a species?
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Natural selection is the gradual process by which heritable biological traits become either more or less common in a population as a function of the effect of inherited traits on the differential reproductive success of organisms interacting with their environment. It is a key mechanism of evolution. The term "natural selection" was popularised by Charles Darwin, who intended it to be compared with artificial selection, now more commonly referred to as selective breeding.