Acids... A. Can be basic B. do not interact with water C. Want to become more negatively charged

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

Which would be the most useful source of evidence to support mcneill's contention?

When a doggo starts to pace around in the same line for a hand full of days. what would that mean?