52. Ecosystems

Which of the following statements about ecosystems is true?

Which ecosystem makes up approximately 70\% of the Earth's surface?

What is the amount of chemical energy in a consumer's food that is converted to its own new biomass over a period of time called?

Which of the following is an example of an ecosystem?

In an ecosystem, what will eventually happen to all incoming energy?

What would happen in an ecosystem if decomposers were absent?

In an ecosystem, which of the following best describes the role of decomposers?

Which of the following is an ecosystem?

The phosphorus cycle lacks a(n) __________ component.

Which of the following best describes how ecosystems are sustained through ecological succession?

Which statement is true about ecosystems?

What can you conclude about an ecosystem with many trophic levels?

Which of the following statements is correct?

What components make up an ecosystem?

What frequently causes eutrophication in lakes?