Which one of the following phenomena supports Darwin's concept of natural selction in organic evolution?

Options

A. Development of trasgenic animals
B. Production of Dolly the sheep by cloning
C. Prevalence of pesticide resistant insects
D. Development of organs from stem cells for organ transplantation.

Answer

C

Explanation

Prevalence of pesticide resistant insects supports natural selection theory e.g., DDT was thought to be an effective insecticide against household pests (like mosquitoes, housefiles, body lice etc.) in 1945 But, within 2 to 3 years. Of its introduction, new DDT resistant mosquitoes appeared in the population. These mutant strains, soon became well established in the population by natural selection and thus replaced the original DDT sensitive mosquitoes.