Most traditional sources of energy come from the?
a. biosphere,
b. hydrosphere,
c. lithosphere,
d. atmosphere

What is the importantence of the carbon and nitretan cycles in the environment

Where does the esophagus lead to in a frog?

Tay-sachs disease is a human genetic abnormality that results in cells accumulating and becoming clogged with very large, complex, undigested lipids. which cellular organelle must be involved in this condition?