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
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