The material for organic evolution is

Which one of the following is $NOT$ a character of disruptive natural selection?

Industrial melanism is an example of what?

Evolution is not continuous. It is a jerky and a discontinuous process. This is the punch line of

Given below are two statements.
Statement $I$ - According to Darwin,the gradual,inheritable variations over a long period of time lead to speciation.
Statement $II$ - According to Hugo de Vries,mutations are the cause of variations.
In the light of above statements,select the correct option given below:

In which of the following organisms is the rate of appearance of new forms the highest?