52. Ecosystems

Which of the following best describes the base of a pyramid of net production?

By which process is carbon dioxide released from plants back to the atmosphere?

Which of the following best describes the relationship between elements of an ecosystem?

Which of the following features are present at the ecosystem level?

Which of the following correctly lists the three basic levels of organization in an ecosystem, along with an example of each?

Which statement about ecosystems is false?

In ecosystems, organisms at the highest trophic levels usually contain less collective biomass than the organisms at lower trophic levels because __________.

Which of the following statements about the movement of nutrients through an ecosystem is true?

In an ecosystem, phytoplankton are _____.

Could an ecosystem function without decomposers? Why or why not?

The global water cycle supports a net flow of atmospheric water vapor __________.

When you eat an apple, you are a __________.

What are the major factors that control primary production in terrestrial ecosystems?

Which of the following descriptions about the organization of an ecosystem is correct?

In an ecosystem, how do nutrients typically move through the environment?