An atom of the element zinc has an atomic number of 30 and a mass number of 65. how many protons does an uncharged zinc atom have? choose one: 30 35 65 95

How do cells grow and reproduce to maintain homeostasis?

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

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity