If mutations arise that affect shell thickness within a snail population then with crabs present those mutations:

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing

In which of the following relationships is one organism always benefited while the other organism is always harmed

Suppose you were the commissioner of corrections for your state. which correctional activities might come within your domain? which mostly would not