Question

The factor that causes most mutations in nature is ______.

Answer 1

The factor that causes most mutations in nature is radiation.

Explanation:

Ionizing radiations have enough energy to cause breaks and alterations in DNA molecules, leading to mutations. Cosmic rays from outer space and natural radioactive substances contribute to spontaneous mutations in living organisms. This continuous exposure to natural radiation is the main source of mutations occurring in nature, providing genetic variability on which natural selection can act in the process of evolution.