Home Preparation for National Talent Search Examination (NTSE)/ Olympiad
Chapter : 7. Heredity & Evolution
Significance Of Variations
Significance Of Variations Some of the neutral variations function as preadaptation to changing environment. For example, heat wave may kill most bacteria except a few which have a pre-adaptation or variation to tolerate high temperature. Evolution : Variations are raw materials for evolutionary processes. Picking up suitable variants by nature or environment forms the basis of evolution. Struggle for Existence : Useful variation provide advantage to the individuals in the struggle for existence and hence survival in nature. Individuality : Variations provide a distinct identity to each and every individual. Artificial Selection : Picking up of certain variations by breeders have resulted in development of a number of breeds and varieties of domesticated plants and animals