Ecosystem ecology

Which of the statements is true regarding the carbon cycle?

All of these choices are correct

Which of these factors likely contributed to the accumulation of 02 within Earth's atmosphere?

All of these choices are correct

Recall that during the Paleozoic Era, atmospheric CO2 levels decreased. Why?

Photosynthetic, woody plants first appeared during this period.

Which of these organisms can incorporate atmospheric carbon directly into C6H12O6, thereby playing a major role in a food web?

Primary producers

In terrestrial ecosystems, nitrogen is returned to the atmosphere by:

denitrifying bacteria

A community or organisms and the physical environment it occupies are known together as a(n):

ecosystem

A ____ takes into account the diverse interactions between primary producers, consumers, and decomposers. It depicts the flow of carbon through an environment as interdependent of primary producers, consumers, and decomposers.

food web

To some extent, Earth's surface reflects solar radiation (in the form of heat), which is subsequently absorbed by certain _____ gases in the atmosphere, such as methane and CO2.

greenhouse

The movement of Earth's crust, plate tectonics, contributes to the long-term carbon cycle through all of the answer choices except:

photosynthesis

Decomposers are vital components of food web because they:

return carbon (as CO2) to the atmosphere.