What is the atomic mass of
an atom?
A. the total number of protons plus
neutrons
B. the total number of protons
c. the total number of neutrons

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

As scientists have investigated evolution from a variety of fields, they have found that some of darwin's orginal ideas were inaccurate or incomplete. t explanation provided by evolution was updated each time to reflect the new information they found. what does this suggest about the theory of evolution? it has become a stronger and clearer theory as new information is collected.

The cell membrane controls what enters and leaves the cell. which of the structures in the diagram below is the cell membrane? — f о