Biology B Standards BI.6.b Populations – 20 Questions » Form A (Master Copy) » Teacher Version

1. In a new habitat, pioneer species are eventually

replaced by other plant immigrants.

A. True

B. False

Answer A

2. Succession is

A. an organism´s ability to survive in its environment.

B. the number of species living in an ecosystem.

C. the regular progression of species replacement in

an environment.

D. the transfer of energy through a food chain.

Answer C

3. The world´s climate is warming as large amounts of

carbon dioxide are released into the atmosphere.

A. True

B. False

Answer A

4. The presence of DDT in birds causes thin, fragile

eggshells, most of which break during incubation.

A. True

B. False

Answer A

5. Companies in the United States continue to

manufacture and export chlorinated hydrocarbons,

even though they are banned here.

A. True

B. False

Answer

A

6. About one-half of Earth´s tropical rain forests have

been destroyed.

A. True

B. False

Answer A

7. The exploding human population is the single greatest

threat to the world´s future.

A. True

B. False

Answer A

8. The decrease in species diversity of some lakes in the

northeastern United States during the 20th century

may best be explained by

A. global warming.

B. evolutionary trends.

C. the destruction of the ozone layer.

D. acid rain.

Answer D

9. In the upper atmosphere, sulfur released from the

burning of sulfur-rich coal combines with water vapor

to form

A. sulfur dioxide.

B. sulfuric acid.

C. ozone.

D. All of the above

AnswerB

10. The destruction of the ozone layer may be responsible

for an increase in

A. cataracts.

B. melanoma.

C. cancer of the retina.

D. All of the above

Answer D

11. Chlorofluorocarbons (CFCs) are a problem because

they

A. corrode aerosol cans and release iron oxide into

the atmosphere.

B. are released by air conditioners into the ground

water.

C. attack ozone molecules in the upper atmosphere.

D. were once thought to be a hazard, but this now

causes unnecessary expense for industry.

Answer C

12. Ozone in the atmosphere

A. leads to formation of acid precipitation.

B. combines readily with water vapor.

C. absorbs harmful radiation from the sun.

D. All of the above

Answer C

13. The greenhouse effect may increase on Earth

because

A. decomposers essential to recycling matter are

being destroyed.

B. too much oxygen is now given off by plants.

C. increasing carbon dioxide will trap more heat.

D. Earth tilts toward the sun in the summer.

Answer C

14. Topsoil

A. is a renewable resource.

B. is formed from the remains of plants and animals.

C. forms at the rate of 1 cm each growing season.

D. forms by the action of water and wind.

Answer B

15. Renewable sources of energy

A. replenish themselves naturally.

B. must be created in laboratories.

C. are manufactured from fossil fuels.

D. were never utilized until the 20th century.

Answer A

16. Destruction of the tropical rain forests

A. threatens the existence of thousands of species.

B. provides for more pasture and farmlands.

C. is done partly because of the need for lumber.

D. All of the above

Answer D

17. A population of organisms grows

A. when there are no natural restrictions except the

availability of food.

B. when the birth rate exceeds the death rate.

C. only in the absence of predators or natural

diseases.

D. All of the above

Answer B

18. Human population growth is most rapid in

A. Europe.

B. the United States.

C. Japan.

D. developing countries.

Answer D

19. One species of shark gives birth to five live young

every two years. Which of these human activities will

cause the greatest change in the shark population?

A. overfishing

B. increased water pollution

C. decreased emissions from cars

D. reducing sewage spills

Answer A

20. Fuel efficiency was measured in four types of

vehicles, a bus, a truck,  a car, and an electric (plug-in hybrid) car. The bus got 8 miles per gallon, the truck got 12 miles per gallon, the car got 22 miles per gallon, and the electric car got 55 miles per gallon. Which vehicle would create the most greenhouse gases if driven the same distance as the rest?

A. bus

B. truck

C. car

D. electric car

Answer A

You have finished this exam.