Natural selection is the answer. Natural selection is a process which organisms adapt more in their surroundings to survive longer. Therefore, when certain traits increase the likelihood of an animal living a long life, it is referred to as natural selection.
When clouds get so full of water droplets that they can not hold any more, the water falls back to the ground as rain but sometimes water droplets freeze and fall to the ground as snow, sleet, or hail.
Answer:
the gallbladder.
Explanation:
A rat's digestive system differs from that of a human digestive system in two ways: it does not have a gallbladder and it has an enlarged cecum or large
