Question

Why do organisms that reproduce asexually reproduce in less time than those that reproduce sexually?

Answer 1

Asexual reproducers don't have to spend time producing gametes, finding mates, satisfying their selection criteria, and then mating. 

I hope this helps:)

Answer 2

In asexual reproduction there are quite fast process like budding,fission .
They also do not search for mates they do it themselves in suitable time.