When do mutations help make an ecosystem more sustainable?

What characteristic make legumes a good food source for food insecure populations

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

Vessels draining the myocardium of the heart, open primarily ,into which chamber?