Which of the following accurately describes nutrient limitation?
a. nitrogen is typically the limiting nutrient in freshwater environments.
b. soil environments aren't affected by nutrient limitation.
c. if one essential nutrient within an ecosystem runs out, primary productivity will be limited.
d. limiting nutrients are the nutrients whose supply is in excess.

Answer is c. If one essential nutrient within an ecosystem runs out, primary productivity will be limited

According to Vitousek et al., 2010, nutrient limitation defined as meaningful additions of an essential element in biologically available forms which increases the rate of primary productivity or increase in the biomass in an ecosystem. Alternately, nutrient limitation may also explained as when the supply of one essential nutrient of the ecosystem runs out the primary productivity of the plants will be limited.

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )