What process converts carbon dioxide gas into usable energy (food)
in the form of glucose?

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

If vegetable oil is made out of veggies, then what is baby oil made out of?

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