Exam 15: Ecosystem Dynamics: The Flow of Energy and Matter

A collection of interacting organisms of different species is a(n)

Ponds have pondweeds attached to the bottom, insect larvae that feed on the pondweeds, fish that eat the insects, and birds like great blue herons that eat the fish. In this ecosystem which of the following would have the largest total biomass (all individuals of the category)?

The branch of science that deals with the study of organisms and how they interact with their environment is known as

As with all organic molecules, carbon forms the backbone of the molecules that comprise plant tissue. This carbon comes from

The amount of plant biomass in an area may increase if there is an increase in the amount of

As energy passes through a food chain, approximately ____ percent is lost as it passes through each trophic level.

Human use of ecosystems

If it were part of a food web, a pigeon could be eaten by

Transpiration is

Which of the following is likely to have the highest biomass in an ecosystem?

Producers are involved in which of the following processes?

-In the diagram above, the most biomass is contained within the

In the carbon cycle the two primary processes that remove and add carbon dioxide to the atmosphere are

Pests that eat the same type of food as humans are part of our

In the food chain grass ? mice ? coyotes:

Which of the following would be a consumer?

The role of decomposers is important to all of the following cycles except the

Which of the following is true of nitrogen?

Carbon first becomes part of a living thing as a result of

Most of the processes that influence the hydrologic cycle are