If evolution has occurred:.
a) the allele frequencies in a population have changed.
b) the mean value for a trait has increased or decreased.
c) the individuals in a population have had differential reproductive success.
d) one species has split into two distinct species.
e) None of the above is correct.

A. The allele frequencies in a population have changed.

answer; i believe that the correct answer is (light);

it's the cell cycle, but cytokines is when the cell divides.

theres 3 stages interphase,mitosis,and cytokines.

interphase prepares the cell for division.

mitosis is the process of dividing the cell,it has 4 parts interphase,anaphase,metaphase,and telophase.

lastly there's cytokines,that's when the cell divides into 2 daughter cells