1. Our reflexes such as pulling your hand away from a flame, are governed by the , while basic functions of motor skills and respiration are governed by the .

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

Describe two recent or ongoing space missions.

Which type of mutation occurs in reproductive cells and can be passed to offspring? somatic mutation germline mutation point mutation frameshift mutation