Compose a three- to four-sentence paragraph that contrasts the organelles and structures you might observe in the cell of a celery stalk and the skin cell of a human.

•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:

substitution is the answer in this case