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
