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.