Explain how sexual reproduction gives rise to more viable variations than asexual reproduction. How does this affect the evolution of those organisms that reproduce sexually?

Sexual reproduction involves two parents. Gametes from male and female fuse to form the zygote. In the process, exchange of genes occurs, which results in variation in the offspring.

On the other hand, asexual reproduction involves a single parent and the organism produced is identical to the parent. Hence there are little or no variations in an organism produced by asexual reproduction.