Week 4 Test Answers

Wolves are predators of deer. What is most likely to happen to the deer population if the wolf population increased?

The map shows the distribution of wild boars in the United States (shaded area). Which of these facts about wild boars is best supported by the evidence provided?

Which human activity is correctly paired with the greenhouse gas that it increases?

A group of environmentalists was discussing the benefits and drawbacks associated with using fossil fuels. Which argument best fits the conversation?

Which describes a way in which phosphorus may enter into the phosphorus cycle?

Which sustainable practice is paired correctly with its impact on the environment?

Review the chart, which shows the population sizes of three African animals in 1990 and in 2000. Population Estimates of Animals in Africa in 1990 and in 2000 19902000Lions100,00047,000Cheetahs25,0007,500Zebras750,000450,000Which explanation is best supported by the numbers in the chart?

Which molecule would be the most affected by limited nitrogen?

Rainforests around the world are being cleared at an alarming rate to make room for new communities, agriculture, mining, and roads, and to provide lumber for construction and furniture. How might the destruction of rainforests affect the balance of gases in Earth's atmosphere?

White perch is a fish that is native to Atlantic coastal regions and is invasive to the Great Lakes. It feeds on native species and is thought to be the cause of the decline of the Great Lakes walleye fish populations. What was most likely its mode of introduction?

What best describes the association between the carbon cycle, plants, and animals?

Osteoporosis is a disease that affects the bones and leads to an increase in bone fractures. Osteoporosis is most likely to be affected by which cycle?

What process adds carbon dioxide to the air?

Which is a renewable resource?

A factory is emitting large amounts of CFCs into the atmosphere. How might this affect people?

Which term refers to a change in one species that results from a change in another species that it interacts with?

When an insect touches the bristles on the lobes of a Venus flytrap, the lobes close quickly, engulfing the insect. The movement of the insect inside the lobes causes the flytrap to secrete digestive enzymes that kill the insect. Which type of relationship does this describe?

Freshwater can be renewed, but environmentalists consider it nonrenewable. Why is there a contradiction in classification?

Which statement best describes a human influence on the biogeochemical cycles?

Which of the following substitutions can help reduce air pollution?