Biology B Quiz 2 Populations

Biology B Standards BI.6.b Populations – 20 Questions » Form A (Master Copy) Directions: Please choose the best answer choice for each of the following questions. 1. In a new habitat, pioneer species are eventually replaced by other plant immigrants. A. True B. False 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. 3. The world ́s climate is warming as large amounts of carbon dioxide are released into the atmosphere. A. True B. False 4. The presence of DDT in birds causes thin, fragile eggshells, most of which break during incubation. A. True B. False 5. Companies in the United States continue to manufacture and export chlorinated hydrocarbons, even though they are banned here. A. True B. False 6. About one-half of Earth ́s tropical rain forests have been destroyed. A. True B. False 7. The exploding human population is the single greatest threat to the world ́s future. A. True B. False 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. 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 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 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. 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 13. The greenhouse effect may increase on Earth because A. decomposers essential to recycling matter are A. 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. 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. 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. 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 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 disasters D. all of the above 18. Human population growth is most rapid in A. Europe. B. the United States. C. Japan. D. developing countries. 19. One species of shark gives birth to five live young every two years. Which of these human activities will cause the greastest change in the shark population? A. overfishing B. increased water pollution C. decreased emissions from cars D. reducing sewage spills     20.  Fuel efficiency was measured in three types of vehicles, a bus, a truck, and a 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

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