What are that process natural selection?

Answer 1

Natural selection is differential reproductive success. It occurs when a population consisting of multiple variants exist in a limited environment. Some variants will be more successful - in terms of producing offspring - than other variants. The term used to indicate the measure of reproductive success of a variant is 'fitness'. The alleles (variations of a gene) of a 'fitter' variant will have a larger representation in the next generation than the alleles of a less 'fit' variant, and so the 'fit' alleles spread throughout the population at a greater rate than less 'fit' alleles. Eventually, less 'fit' alleles may even vanish from the population entirely. When an allele is so successful that it becomes the only variant for a given gene, we say that the allele has become 'fixed'.

Note that the term 'fitness' has no direct relation to the health, strength, intelligence or speed of the variant: the only measure of 'fitness' is the reproductive success of the variant.

Answer 2

firstly, there is genetic variation already present within the population. this variation arises randomly, from mutations or as a result of sexual reproduction.

then there is a change in the environment. selective pressures change and those better adapted to the environment survive (they are 'selected') and those who cannot adapt die.

the survivors reproduce, passing on their advantageous trait to the offspring.

over a long period of time, the new population has this trait and is able to survive in new condition.

Answer 3

Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring. Over time, this leads to the accumulation of favorable traits in a population, as individuals with these traits are more likely to pass them on to their offspring. This process is a key mechanism of evolution.

Answer 4

The process of natural selection is process in which is the weaker individual deprived of reproduction.

Answer 5

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