Exam 24: Principles of Ecology

First-level consumers are represented by the letter ____.

Climate shifts may lead to affects on human activities such as

At the bottom or base of a pyramid of energy are the

Third-level carnivores are represented by the letter ____.

Most of the water vapor in the earth's atmosphere comes from evaporation from

Humans incorporate nitrogen into their bodies

Food chains rarely have more than three levels of consumers because

The chemical elements that are available to producers are usually in what form?

Which of the following is a habitat?

Most of the energy within an ecosystem is lost

Nitrite in the soil is represented by the letter ____.

Selecting the Exception Four of the five answers listed below are related by a common action. Select the exception.

After energy flows into a food web, it leaves mainly by

The simple food chain: grass >>> zebra >>> lion provides a good example of a pyramid of

A secondary consumer could eat

Second-level consumers are represented by the letter ____.

Carbon is stored in what form?

Which of the following would be more likely to affect an animal's habitat than its niche?

Which of the following combinations of organisms could be expected to survive in isolation from other forms of life available?

Ammonia and ammonium in the soil are represented by the letter ____.