5. Which of the following increases in the blood of an athlete due to high training? A. platelets B. red blood cells C. white blood cells D. fibrinogen

Depending on the organism the number of in a cell may change

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

The illustration shown is an ovum, a female sex cell. a mutation in this cell may be passed to the woman’s offspring during a) birth. b) mitosis. c) dna replication. d) sexual reproduction