Which word or phrase means "the exchange of gases between the atmosphere and the lungs"?

In each transformation of energy , some energy what?

How does food concentration affect yeast activity

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water