Variation in gene frequencies within populations can occur by chance rather than by natural selection. This is referred to as

Natural selection where more individuals acquire specific character value other than the mean character value,leads to:

Assertion : Natural selection is the outcome of difference in survival and reproduction among individuals that show variation in one or more traits.
Reason : Adaptive forms of a given trait tend to become more common; less adaptive ones become less common or disappear.

Find the mismatch from the following pairs.

The sequence of events in geographic speciation is most likely to be

Which of the following can be used as an illustration to demonstrate the process of evolution in animals?