Rate of mutation is affected by:
1. temperature
2. X-rays
3. gamma rays
4. all of these

Options

A. temperature
B. X-rays
C. gamma rays
D. all of these

Answer

D

Explanation

Any extracellular physical or chemical factor which can cause mutations or increase the frequency of mutations in organisms is called mutagen. They include, temperature and high energy radiations such as X-rays, ultra-violet rays and gamma rays.