Exam 23: Global Ecology and Human Interferences

Both energy and chemicals cycle through an ecosystem.

What is at the beginning of a grazing food chain?

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

What organism would be at the second level in a detrital food chain?

Water vapor contributes to global warming.

Diagram an ecological pyramid that consists of four trophic levels. Indicate the category of organisms at each level and provide an example of an organism for each category.

Which of the following is on the same trophic level as a rabbit?

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

From the North Pole south, what is the first type of ecosystem encountered?

The global climate has already warmed about 0.6 degrees Celsius since the Industrial Revolution.

What kind of an organism is an earthworm?

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

What two characteristics define a biome?

Most ecosystems contain quaternary consumers.

Which of the following biogeochemical cycles is a sedimentary cycle?

How much of the food energy taken in by an herbivore is passed on to a carnivore?

A biogeochemical cycle involves only the abiotic components of an ecosystem and describes how chemicals circulate through those components.

If the first-level carnivores consumes 500 kg of energy from herbivore tissue, how much is available to the second-level carnivores?

One of the consequences of building roads, parking lots, and buildings is

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