APES studying

In a given ecosystem, producers convert solar energy into 15,000kcal of chemical energy stored in organic compounds. Which of the following is the most likely amount of energy available to secondary consumers?

150 kcal

The net annual primary productivity of a particular wetland ecosystem is found to be 8,000 kcal/m2 per year. If respiration by the aquatic producers is 12,000 kcal/m2 per year, what is the gross annual primary productivity for this ecosystem, in kcal/m2 per year?

20,000

Which of the following best describes the net primary productivity of an ecosystem?

Net primary productivity is the amount of energy lost through respiration by producers subtracted from the gross primary productivity of an ecosystem.

Of the following ecosystems, which has the lowest net primary productivity, measured as kilocalories of energy produced per square meter per year?

Desert

Scientists calculated the net primary productivity at two different forest sites. Both forests have the same gross primary productivity. Forest A has a net primary productivity of 1,650 kcal/m2/year, and forest B has a net primary productivity of 1,110 kcal/m2/year.

Forest A producers have lower rates of cellular respiration than forest B producers.

Assuming all other variables are constant, which of the following is the most likely conclusion about the greatest potential for gross primary productivity that can be supported by data in the graph?

Gross primary productivity in Location 1 is greater than that in Location 2 in March.

Which of the following best describes gross primary productivity in an ecosystem?

Gross primary productivity is the total amount of solar energy captured by producers through photosynthesis over time.

The terrestrial biomes shown in the diagram above vary in net primary productivity. The explanation for the variation includes which of the following?

I and II only

A timber company removes 100 square miles of rain forest in order to convert the land to a palm oil plantation in which palm trees are exclusively grown. How will this affect the NPP of the ecosystem?

The NPP will decrease because there will be less plants per unit of area than before.

True or False, the higher the NPP, the more productive the ecosystem is.

True

For a primary producer, the main function of photosynthesis is to manufacture

glucose

Which of the following are products of photosynthesis?

glucose and oxygen gas

Which of the following are reactants that are needed for photosynthesis?

water and carbon dioxide gas