The scientist who proposed the theory of natural selection is $......$.

Which of the following is an effective force in biological evolution?

In a Mendelian population,genetic drift occurs in which of the following?

In a population of plants,some were extremely tall,and the remaining were extremely dwarf. No plants of the population showed intermediate height. The type of operation of natural selection in the above case is

Allopatric speciation is due to

The process of natural selection was named as survival of the fittest by . . . . . . .