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1. Salinization is a common agriculture problem in what type of regions


2. In some regions groundwater withdrawals can contribute to sinkholes, in which

Empty underground caverns suddenly collapse

3. The first genetically modified animal for human consumption is a salmon with extra growth hormones. Which of the following is NOT a concern about this animal?

They will probably outcompete wild salmon for habitat

4. The three crops that humans rely on for the majority of nutrients and calories are

Wheat, rice, and maize(corn)

5. Undernourished parents often raise children who are undernoursished because the parents

Cannot afford to feed their children properly

6. Chronically, undernourished people's diets do not provide 2,200 kcal per day on a long-term basis


7. Soil eroded from one location has to go somewhere else. A lot of it is washed down streams and rivers. Which of the following is not a form of environmental degradation associated with eroding soils?

global warming

8. Use of predators, parasites, and competitors for pest control defines which of the following?

Biological pest control

9. Even fertile land not naturally threatened can undergo desertification. Around the world, this has been most widely caused by


10. Point source pollution comes from discrete and identifiable places so they are easy to monitor and regulate


11. Which of the following would have nearly zero topsoil?


12. Contour plowing and strip farming are methods designed to

Prevent water and soil loss

13. Soil organisms usually stay _____ the soil

Close to the surface of

14. CWA stands for Clean Water Act


15. The water pollutant that most commonly threatens human health

Pathogenic organisms

16. Which of the following statements is true

Humans may have been causing extinctions thousands of years ago, but our impact has recently increased

17. The objective of a species recovery plan is to

Increase an endangered species population until it is no longer endangered

18. 97% of all water on the Earth is in the oceans. Which of the following is the correct order of the Earth's water storage compartments, from largest to smallest?

Ocean, ice caps, groundwater, lakes, atmosphere, rivers

19. Pest organisms tend to be

Generalist species

20. Habitat fragmentation usually leads to a(n)

Decrease in biodiversity

21. The biomagnifications of DDT demonstrates that

Higher trophic levels organisms can concentrate toxins in a type of "inverse biological pyramid"

22. Factories, sewage treatment plants and oil wells are _____ sources of water pollution.


23. Vitamin A deficiencies are associated with


24. GRAPH OF LITERS USED PER PERSON AND POPULATION. On the graph above of domestic water use per person, each letter represents a country. Which of the following is most likely?

A is United States and B is china

25. Eating low on the food chain is more efficient than eating high on it. However according to the Environmental science text, conversion of all present rangeland to crop land would increase environmental damage because

Not all land is suitable for agriculture; some is better suited to grazing

26. About 11% of the earth's surface (excluding antartica) is under agriculture. In simplest terms, if the world's human population doubles in the future, then either the total agriculture acreage must double or else ________ must double

Agricultural yields per acre

27. Biomagnification is a concentration of toxins

As predators consume and store the toxins that were stored in the bodies of their prey

28. Agriculture in less developed countries can e significantly affected by all of the following except

Crop circles

29. Monoculture production of crops is more vulnerable to outbreaks of disease because this type of farming

Simplifies the ecosystem and reduces biodiversity

30. An oxygen sag occurs most often

Immediately downstream from a pollution source

31. A method of increasing water supplies that has been successful but expensive is


32. Bioaccumulation is important because it allows cells to

Accumulate essential nutrients and minerals

33. Modern demand-based agriculture involves all of the following characteristics except

Cultivation of subsistence crops

34. The main reason for continued trade in endangered species is

Pet lovers and collectors who like exotic species

35. People can suffer malnourishment if they consume large amounts of _____ instead of ______

Fat and sugar; vitamins and protein

36. The stratified horizontal layers of soil are called soil..... ; good soil will have at least ..... of those ..... with ....... Being the most important for agriculture


37. Mineral particles in the soil are derived from

All of these are correct

38. A species in imminent danger of extinction is classified by the US Endangered species act as


39. Which of the following are among the causes of indirect deforestation

Acid rain and ozone

40. The main reason that there are relatively few invertebrates categorized as endangered species is because

We consider the other groups such as mammals to be more intresting and desirable

41. If 100 cups of strong coffee contain a lethal dose of caffeine, why don't coffee drinkers eventually die from caffieine overdose?

Our bides metabolize the caffeine before lethal concentrations are reached

42. Island ecosystems are extremely susceptible to invasive species


43. Which of the following does not represent reduction of erosion by vegetation

Vegetation leads to reduction of chemical weathering of the bedrock and desertification

44. Wetland protection is one of the most controversial provisions of the _____ because opponents believe that the legislation is _____

Clean water act; infringement on their use of private property

45. The hydrologic cycle refers to the recycling of

All water

46. Most of the species that are yet undiscovered are probably


47. Monoculture is associated with

Decrease in ecosystem biodiversity and organic matter in the soil

48. The world health organization regards health as primarily a matter of _____ well being

Physical, mental, and social

49. The main reason that surface water pollution has largely decreased in the US since 1950 is

The Clean Water Act

50. The cheapest and most effective way to reduce water pollution is to use technology to separate wastes for nonpoint sources


51. The atmosphere has the greatest _____ of the earth's hydrologic compartments

Turnover rate and smallest water volume

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