Question

Which of the following is an example of a population having variations?

Answer 1

Answer:

Some worms are nocturnal and some a diurnal

Explanation:

Variation is difference between cells, individual organisms, or groups of organisms of any species caused either by genetic differences (genotypic variation) or by the effect of environmental factors on the expression of the genetic potentials (phenotypic variation).

NOTE:these are of the same species.