The reason phytoplankton have to live in shallow ocean water is because

a. they require sunlight to carry out photosynthesis.
b. they are an important food source to surface-dwelling marine organisms.
c. they cannot withstand the colder temperatures of deep water.
d. they feed on tiny organisms living at the surface.

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature above 37 degrees celsius (98.6 degrees f)? describe what might happen if the temperature decreased by 10 degrees celsius.

The arrows indicate the direction of wind flow. which place experiences monsoons?

Cells a and b are the same size and shape, but cell a is metabolically quiet and cell b is actively consuming oxygen. oxygen will diffuse more quickly into cell because . b the oxygen molecules inside cell b have a higher kinetic energy b. a its membrane transport proteins will not be saturated c. a the diffusion gradient there is shallowerd. b the diffusion gradient there is steeper