Question

Darwin in his 'Natural selection Theory' did not believe in any role of which one of the following in organic evolution :

• A. Parasites and predators as natural enemies.
• B. Survival of the fittest.
• C. Struggle for existence.
• D. Discontinuous variations.

Answer 1

The correct option is D Discontinuous variations.

Darwin in his 'Natural selection Theory' did not believe in any role of discontinuous variation. Darwin believed in continuous variation, for example, Darwin's finches, vary continuously: every individual in the population differs slightly from every other individual. Discontinuous variation is controlled by alleles of a single gene or a small number of genes. The environment has little effect on this type of variation. For example blood groups.