The picture is a cross section of a bone. A cross sectional view of bone. X points to the inner layer. Y points to the middle layer.

Which structures of the bone are indicated by the arrows?

What is the name for a substance formed in a chemical reaction

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

In pea plants, yellow seed color (y) is dominant and green seed color (y) is recessive. based on the punnett squares, what are the chances that the offspring in the second generation will have green seeds? first generation y y y yy yy y yy yy second generation y y y yy yy y yy yy there is a % chance that the offspring will have green seeds.