A. An introduced plant?s rapid growth can deprive native plants of sunlight.
B. An introduced plant?s rapid growth can deprive native plants of food.
C. An introduced plant can cause soil loss from erosion.
D. An introduced plant?s rapid growth can deprive native plants of oxygen.
2. What is one of the greatest threats to biodiversity on Earth?
A. habitat destruction
B. loss of drinking water
C. decrease in food supply
D. pollution
3. In which biome is biodiversity most threatened?
A. tropical rain forest
B. grassland
C. taiga
D. wetland
4. The Alaskan pipeline is raised up on "legs" in areas along caribou migration paths. Why was it built this way?
A. to prevent damage to the pipeline by caribou
B. to prevent harm to the caribou by the pipeline
C. to prevent habitat fragmentation
D. to prevent caribou from migrating to the wrong habitat
5. Why might an introduced animal species overrun native species in an ecosystem?
A. Its population size is smaller than those of native species.
B. It is more energy efficient, so it eats less food.
C. It is a predator of the native species.
D. It often has no natural enemies.
6. What does the Endangered Species Act do?
A. It provides food for endangered species.
B. It protects organisms that are near extinction and their environments.
C. It protects populations of animals from predators.
D. It protects endangered plant species only.
7. Which term describes the practice of managing resources so that current needs are met without harming future generations?
A. species introduction
B. sustainable development
C. habitat fragmentation
D. biomagnification
8. Why does clear cutting lead to a loss of biodiversity?
A. Lumber companies kill the animals in an area when they cut trees.
B. An entire ecosystem is destroyed when all the trees in an area are cut down.
C. Too much sunlight enters the area after the trees are cut down.
D. Tree seedlings cannot be produced.
9. Which of the following techniques can help prevent populations of slow-growing fish from being depleted?
A. fishing gear review
B. rotation
C. fishing bans
D. harvest reduction
10. Which law regulates emissions from automobiles and industrial factories?
A. Clean Water Act
B. Endangered Species Act
C. Clean Air Act
D. National Environmental Policy Act
Quick Reply
