What is one of the reasons why Gregor Mendel chose to study pea plants? They exhibit only a single trait.
O They produce flowers.
They grow very slowly.
They reproduce sexually.

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 organelle breaks down sugar molecules that supply energy to the cell ?

Several billion years ago which gas was the least prevailant in the atmosphere