The vertebral column extends from the skull to the

What are the student's observations and inferences before he starts his investigation?

Asquirrel population lives in an area. over many years, a river in that area grows wider and stronger, eventually forming a canyon. the squirrel populations on the two sides of the canyon can no longer mate with each other and ultimately form distinct species. this is an example of

Genes that come together with different alleles are heterozygous. homozygous. genotype. segregated.