Which of the following is $NOT$ considered a part of Darwin's theory of Natural Selection?

According to Hugo de Vries, mutations are ..........

$A$ scientist who worked on rats cut their tails up to $21$ successive generations,but at last,he found that the tails remained normal. Which scientist's theory is disapproved by this experiment?

To be evolutionarily successful,a mutation must occur in the

Given below are two statements.
Statement $I$ - In disruptive natural selection,individuals acquire peripheral character value at both the ends of the distribution curve.
Statement $II$ - Industrial melanism is an example of disruptive selection.
In the light of the above statements,select the correct option given below:

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