Explain how carbon is cycled through an ecosystem.

Describe what happens to an ecosystem when a keystone species is removed.

Predict What components do you think a forest ecosystem might include?

Which term describes the process whereby toxic substances increase along trophic levels of an ecosystem? a. biomassification b. biomagnification c. bioentropy d. heterotrophy

Figure 44.21 In which of the following regions would you expect to find photosynthetic organisms? the aphotic zone, the meritic zone, the oceanic zone, and the benthic realm the photic zone, the intertidal zone, the meritic zone, and the oceanic zone the photic zone, the abyssal zone, the meritic zone, and the oceanic zone the pelagic realm. the aphotic zone, the meritic zone, and the oceanic zone

VISUALIZE Draw a diagram tracing energy flow through a food web such as one found in a deciduous forest.

What are the roles of the following processes in the carbon cycle: photosynthesis, cellular respiration, combustion, and erosion?

The ______ cycle is a sedimentary cycle. a. phosphorus c. nitrogen b. carbon d. water

Describe at least two ways that human activities are altering air quality.

An organism exists for long periods by using only CO2 and H2O. herbivore. carnivore. decomposer. autotroph. heterotroph.