Where does the exchange of oxygen, nutrients, and wastes occur?
a. in capillaries
b. in arteries
c. in the lungs
d. in the atria

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight

Which coal field location is related to coal fields in the eastern united states and supports the theory of continental drift? eastern india southern africa western australia northern south america

Amines amides and amino acids are categories of