Why does asexual reproduction take less energy to perform than sexual reproduction?

Answer 1

In asexual reproduction each individual in the offspring has the same genes as the parent. In sexual reproduction the genes of two individuals are combined to create a more diverse set of genes in each individual. This gives more diversity in the offspring. As the individuals with good genes, as in genes that are helpful in their specific environment, are more likely to survive, this means that the species will evolve and develop positive attributes.

Answer 2

If they are produced advantageously, they have a more likely chance as a species to survive through disease, etc. because they are more diverse.

Answer 3

Because it doesn't need to create sex cells