A los autótrofos se les llama también:

Tlymphocytes mature in the? a. thyroid gland. b. bone marrow. c. spleen. d. thymus.

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

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?