In sexually reproducing animals, once fertilization of the egg takes place, the ___________ exists as a single cell until cell division begins.
D) zygote
None of the above i believe... if not it’s specialization
"A gene pool consists of all genes, including all the different alleles that are present in a population. Number of times an allele occurs in a gene pool compared with the number of times other alleles occur. In genetic terms, evolution is any change in the relative frequency of alleles in a population."
Is there a choose to the question
<span> Geographical</span> isolation refers to a population of organisms (such as plants and animals) that are separated from other species, thus unable to exchange genetic material with other organisms because of physical boundaries that isolate them or any unfavorable circumstances that prevent interbreeding.
