Unit 11

What kind of consumer breaks down dead plants and animals?

Which model correctly shows energy flow in a food chain?

How is energy "lost" as energy goes up in the pyramid?

If the seeds, nuts, roots, grass, leaves, and flowers level had 1,000 kcal, how many kcal would be in the hawks and owls level?

Carbon is used in the process called __________ by plants and algae to make food and the building blocks for growth.

According to this diagram, plants use nitrogen to make _________________________

A correct path that nitrogen could take would be

In the nitrogen cycle, what does label A in the diagram represent?

The end result of ecological succession is usually a(n)

Which of the following is not a possible cause of ecological succession?

What do the arrows on a food web show?