Variation refers to the difference in the characterstic or traits among the individuals of a species.

Variation is beneficial to the species because:

1. It enables the organism to adapt themselves in changing environment .

2. It forms the basis of heredity.

3. It forms the raw materials for evolution and development of new species.

Thus accumulation of variations in a population led to population to adapt to the changes and the new needs. This provide survival advantage to the species