The need for protein is actually a need for
a. phytochemicals
b. amino acids
c. calories
d. carbohydrates

How is the motion of the particles of water at 80 ⁰c different from the motion of the particles of water when it is 30 ⁰c?

Which level of consumer had access to the smallest apply of energy

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen