"all of the substances are which cause inheritable changes in genetic material."

Mutagens are substances which cause inheritable changes in a genetic material

Explanation:

Mutagens are chemical compounds or radiations that can cause changes in a genetic material. These changes are referred to as mutations which occurs in the cellular genetic material, deoxyribonucleic acid, of a biological molecule.  

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

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