Q. Which one of the following phenomena supports Darwin's concept of natural selection in organic evolution ?
A) Development of transgenic 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
Explanation
[Solution from source] When a pesticide is used, the rare resistant insects survive and reproduce, so resistance spreads through the population. This is natural selection working on existing variation. Transgenics, cloning and stem-cell organs are human technologies, not natural selection. Answer (3).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.