in a horse population the allele frequency for a coat color changes from 35% to 50%. Is this population evolving? Why or why not?

) No gene mutations may occur and therefore allele changes do not occur.

2) There must be no migration of individuals either into or out of the population.

3) Random mating must occur, meaning individuals mate by chance.

4) No genetic drift, a chance change in allele frequency, may occur.

5) No natural selection, a change in allele frequency due to environment, may occur.

Explanation:

Here are the steps maybe this helps a little

parasites can detrimentally affect their host, but also must not allow their host to die before they can complete their life cycle. some parasites have complex life cycles with many different hosts, and have had to find ways of persisting in many different environments during the change from one host to another. ectoparasites live outside the body of the host, and can more easily  disperse, but are  more exposed to predators, parasites, parasitoids. endoparasites live inside the body of the host, and are therefore protected from the outside environment. but they can be  attacked by the host's immune system. they have therefore developed  mechanisms for dispersal such as  complex life cycles.