Asexually reproducing organisms lack mechanisms for generating genetic diversity within a population.

The correct answer is true.

Explanation:

Asexual reproduction is a type of reproduction which produces two daughter cells with the same genetic material from the parent cells.

The asexual mode produces daughter cells by the involvement of a process termed mitosis which is a type of cell division. The mitosis takes place in the somatic cells of the organisms and produces the "clones". They produce genetically similar cells as no crossing over takes place in mitosis which is the basis of the genetic diversity on earth.

Thus, true is the correct answer.