6. the nutrient availability of aquatic ecosystems is the (1 point)
a. amount of nitrogen, oxygen, and other elements dissolved in the water.
b. number of other organisms present in the water.
c. amount of rainfall the water receives.
d. number of different animal species living in the water.

7. in a logistic growth curve, exponential growth is the phase in which the population (1 point)
a. reaches carrying capacity.
b. grows quickly.
c. growth begins to slow down.
d. growth stops.