Question

Evolution is a change in the gene frequencies in a population in responseto changes in the environment in a time scale of years and not centuries. Justify this statement with reference to DDT. How does the theory of Hugo de Vries support this?

Answer 1

The utilization of DDT out of the blue brought about the passing of most extreme number of mosquitoes yet a couple endure. Later on it was discovered that mosquitoes proceed to endure and repeat even within the sight of DDT. It is on the grounds that the continued utilization of DDT made the mosquitoes impervious to DDT inside a couple of years because of variety and change in quality frequencies in their populace in connection to changes in condition inside a period range of couple of years as it were.

As indicated by Hugo de Vries the advancement is caused by a solitary advance vast change emerging out all of a sudden in a populace.