Q6 of 52 Page 49

Comment on the statement that "evolution and natural selection are end result or consequence of some other processes but themselves are not processes".

It is an ongoing debate whether to call evolution and natural selection as an end result or a process.

When we talk about the world and the different organisms that we see today, we refer to evolution as being a process that result in all these changes. But, when we talk about life itself we say that evolution is a consequence of natural selection.


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4

While creation and presence of variation is directionless, natural selection is directional as it is in the context of adaptation. Comment.

 5

The evolutionary story of moths in England during industrialisation reveals, that 'evolution is apparently reversible'. Clarify this statement.

 7

State and explain any three factors affecting allele frequency in populations.

 8

Gene flow occurs through generations. Gene flow can occur across language barriers in humans. If we have a technique of measuring specific allele frequencies in different population of the world, can we not predict human migratory patterns in pre-history and history? Do you agree or disagree? Provide explanation to your answer.