Answer the following:

What is the role of variations in evolution?

Variations are the differences and changes that the next generation exhibits as compared to their parental generation.

Variations play a very important role in evolution. As we know the environment is continuously changing and in order to adapt to the changing environment organism also needs to make certain changes; otherwise they won’t be able to survive.

Variations make this thing possible because they are the changes which arise spontaneously due to some reason or the other. These are the changes which can be both advantageous and harmful to the organism. The variations which are advantageous are selected by the environment because they provide benefit in the survival while those are harmful are rejected by the environment. As the advantageous variations are selected by the environment they help in the evolving the organism with the changing environment so it can better adapt to the environment. Also, these variations are inherited by the next generation so with time they start becoming part of that species and thus evolve the species with the change in environment.