For evolutionary success,mutations must occur in (or) significant mutations must occur in .....

The essence of Darwinian theory about evolution is $.....$ .

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

Following are sex ratios obtained from a given area. Which one will show an evolutionary stable strategy between males and females respectively?

Given below are the two statements.
Statement $I$: Directional isolation favours the intermediate forms and eliminates both phenotypic extremes.
Statement $II$: In directional isolation,more individuals acquire a value other than the mean character value.
In the light of the above statements,choose the correct answer from the options given below:

An organism that possesses traits to survive and promote reproductive success is considered to be: