52. Ecosystems

The base of an energy pyramid is always composed of _______________.

Which of the following best describes the direction of energy flow through an ecosystem?

Which statement best explains energy transfer in a food chain within an ecosystem?

Which of the following best describes the direction of energy flow through an ecosystem?

Why is the transfer of energy in a food chain usually only about 10 percent efficient?

In the ecosystem energy budget, primary productivity is like _____.

In an ecosystem, all incoming energy will eventually be __________.

Which of these is the primary source of energy in an ecosystem?

Which of the following best describes the flow of energy in the Everglades food web?

What is the role of a consumer in the flow of energy through a food chain?

In a healthy ecosystem, how does energy flow from the Sun to plants and then to animals?

What is one way in which the movement of energy and chemicals differ in an ecosystem?

Which of the following best explains whether producers could survive without consumers in an ecosystem?

Which of the following is the result of the one-way path of energy flow through the ecosystem?

The information provided by an energy pyramid reveals that for human food choices, which of the following is most energy-efficient?