No two species of anoles lizards living in the same geographical location have dewlaps of the same size, shape or color. why?

Dna is colied into chromosomes in a cell

Plz ! cattle ranchers and dairy farmers rarely allow all of their animals to reproduce instead they practice selective breeding and only encourage the reproduction of animals with specific features. which of the following cows would a dairy farm most likely choose to reproduce? a. a cow that makes a lot of milk. b. a cow that can run quickly. c. a cow with a think, soft fur. d. a cow with large, strong hooves.

What is the problem in this article? what solution does the article propose?