Aspecies of small lizard has three color forms, pale gray, brown, and black. in its original range, the colors of the rocky environment were mixed from pale gray to very dark, and the population had an even mix of all three color forms. the blending of colors with their environment the lizards hide from predators. a group of these lizards ended up on an island with all gray rocks. eventually, only gray lizards remained. this is an example of

Directional Selection

Explanation:

In population genetics, directional selection also know as positive selection is a mode of natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype

is called echinoderms

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.