Exam 24: Ecology and the Nature of Ecosystems

What do autotrophs require in order to produce food for themselves and all the heterotrophs?

What two characteristics define a biome?

Both energy and chemicals cycle through an ecosystem.

The richest marine ecosystems are those in the open water where large fish abound.

Are humans capable of upsetting global biogeochemical cycles with their activities?

Life on Earth is dependent on a continued input of energy from the sun.

Which term is analogous to the word "niche"?

Do all ecological pyramids have a broad base with a smaller top?

Which of the following is a legume involved in housing nitrogen-fixing bacteria?

How does phosphate enter the soil?

Hail and snow are examples of

Organisms that live in an aquatic environment get their carbon from calcium carbonate shells on the bottom, instead of from carbon dioxide in the environment.

When water evaporates from the ocean, it leaves the salts behind.

Which of the following defines an ecosystem?

Almost 100% of the energy taken in by plants from the sun is available to an ecosystem.

What is the primary source of carbon for aquatic algae?

Which of the following is not a greenhouse gas?

What is the name of the frigid ecosystem bordering the North Pole?

A detrital food web and a grazing food web are separate because each starts at a different level.

The atmosphere would be considered what component of a chemical cycle?