what is the process which populations of organisms with variations that help them survive in their enviornments live longer, compete better, and reproduce more than those that do not have the variations?

the major parts of the digestive system:

salivary glands.

pharynx.

esophagus.

stomach.

small intestine.

large intestine.

rectum.

accessory digestive organs: liver, gallbladder, pancreas.

b) the inside picture would look at a very high temperature in a very low ph

geologic time scale (for gradpoint) =)

i think the answer is c hope this