Question

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

• A. Production of 'dolly', the sheep by cloning
• B. Development of organs from 'stem' cells for organ transplantation
• C. Development of transgenic animals
• D. Prevalence of pesticide resistant insects

Answer 1

The correct option is D Prevalence of pesticide resistant insects

Excessive use of herbicides, pesticides, etc., has resulted in the natural selection of resistant varieties of insects. This is also true for microbes against which we employ antibiotics or drugs against eukaryotic organisms/cell. Hence the prevalence of pesticide resistant insects is the phenomenon that supports Darwin's concept of natural selection in organic evolution.
Clones are organisms that have exact genetic copies.
Stem cells are a class of undifferentiated cells that are able to differentiate into specialized cell types.
A transgenic animal is one whose genome has been changed to carry genes from other species.