Are fossils derived from a common ancestor ?

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

What are the possible blood types among the children of parents that are ab and ii? oa) types a and b ob) types a, b, and ab c) types a, b, and o od) types a, b, ab, and o

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time