Which statement is true of natural populations?

Viable populations exhibit little, if any, genetic variation.

Populations are all uniform in size.

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

Population is a collection of individuals of a species living in a defined area

Explanation:

Population:This is a collection of individuals of the same species occupying the same space and able to interbreed freely with one another when individuals of different sexes are brought together.

A species of animals may comprise a single cohesive population or may contain many geographical distinct populations.

Example:A population of Agama lizards in a Campus located in China. The whole human race, Homo sapiens comprising the black, Mongolian, red and white is a population. A population of Cercopithecus erythrogaster (Monkeys).