Douglas fir If the same organisms are with each other they all get the disease but if different ones are with them only the same organisms will get the disease.
If there is a dark tree and white moths on it, predators would eat them. If there were black moths on the tree they would survive and the dark moth population would go up.
Darwin studied finches on Galapagos island and learned natural selection. All the finches had different beaks to adapt to their environment. Some had big beaks and some had small beaks.
Structural adaptation is what an organism has in it to adapt to its environment. Physiological is what an organism has. Behavioral is like hibernation, when bears have to sleep during the winter.