Question

which statement is true of natural populations?
o viable populations exhibit little, if any, genetic variation.
o populations are all uniform in size.
o populations are all the individuals of a species living in a defined area.

Explanation:

• For the first option: Viable populations actually have genetic variation which is important for adaptation and evolution. So this statement is false.
• For the second option: Populations can vary greatly in size. For example, a population of elephants in a small reserve will be much smaller than a population of bacteria in a large lake. So this statement is false.
• For the third option: By definition, a population is all the individuals of a species living in a defined area. This is a fundamental concept in biology (specifically in the sub - field of Ecology which is related to Biology).

Answer:

Populations are all the individuals of a species living in a defined area.