Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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Which of the following farm practices have been used by farmers only in recent
years?
a. | fertilizing crops | c. | pest control | b. | irrigation | d. | None of the
above |
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2.
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Farmland may become desertified if
a. | domestic animals are allowed to overgraze the land. | b. | too many crops are
grown on the land and the land gradually loses its fertility. | c. | as a result of
erosion, there is no fertile soil left to grow plants. | d. | All of the
above |
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3.
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Land where it is possible to grow crops is called
a. | organic land. | c. | vegetative land. | b. | agricultural land. | d. | All of the
above |
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4.
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Which of the following actions contributes to soil erosion?
a. | using compost as fertilizer | b. | allowing land to lie fallow | c. | driving farm
machinery over fields | d. | all of these practices contribute to soil
erosion |
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5.
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Which of the following agricultural products requires the least amount of
energy?
a. | beef cattle | c. | dairy cows | b. | wheat | d. | Both (b) and
(c) |
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6.
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When a farmer uses no-till farming methods,
a. | seeds are planted among the roots of the previous crop. | b. | more erosion is
likely. | c. | only organic fertilizers are used. | d. | All of the
above |
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7.
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One potential way to deal with the problem of seafood overharvesting is by
intensifying _____ efforts.
a. | genetic engineering | c. | aquaculture | b. | subsistence farming | d. | integrated pest
management |
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8.
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Which of the following is a good way to reduce salinization?
a. | use ocean water instead of groundwater to irrigate crops | b. | increase the use of
synthetic pesticides | c. | using rainwater instead of groundwater on
crops | d. | adopt no-till farming methods |
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9.
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DDT is harmful to the environment because it
a. | does not break down quickly into harmless chemicals. | b. | concentrates in the
bodies of animals high in the food chain. | c. | causes some birds to lay eggs so thin that they
break when the birds sit on them. | d. | All of the
above |
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10.
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A true statement about nutritional requirements in humans is that
a. | vitamins are of limited importance in growth and development. | b. | humans need to get
eight essential amino acids from the proteins they eat. | c. | carbohydrates are
mainly used to make membranes and hormones. | d. | Both (a) and
(b) |
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11.
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All of the following factors can cause famines except
a. | the failure of food production to keep pace with population
growth. | b. | distribution problems caused by political turmoil. | c. | new, higher-yield
crops. | d. | crop failure brought on by sustained drought. |
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12.
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The results of the green revolution were not entirely positive because
a. | there were too few subsistence farmers. | b. | use of pesticides
and fertilizers increased the risk of pollution. | c. | substantial resources were no longer required
to grow the new grain varieties. | d. | All of the
above |
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13.
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Soil formation
a. | is an inorganic process. | b. | occurs more quickly in arid
regions. | c. | is hindered by frequent temperature changes. | d. | usually involves the
decomposition of bedrock. |
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14.
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It is true that soil loss caused by wind and water
a. | occurs more slowly in dry areas because the soil sticks together. | b. | is reduced by
incorporating strips of vegetation into plowed land. | c. | only slightly exceeds the rate of soil
formation on a global basis. | d. | is always the result of dramatic events such as
floods and mudslides. |
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15.
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No-till farming helps to conserve soil fertility because
a. | remnants of the previous crop are left to slowly decay. | b. | deep ridges are cut
across, not down, the slopes of hills. | c. | the ground is carefully turned to mix soil
nutrients. | d. | only organic fertilizers and natural pesticides are
used. |
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16.
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Irrigation water usually comes from
a. | rainwater collection. | c. | salty sources. | b. | rivers and groundwater. | d. | All of the
above |
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17.
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Pest populations that damage plants
a. | breed more slowly in hot climates. | b. | become resistant to pesticides via natural
selection. | c. | include only insects and small rodents. | d. | attack wild plants
with greater success than crops. |
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18.
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Persistent pesticides are those that
a. | require repeated high-dose use for optimum effect. | b. | retain their
popularity among U.S. farmers. | c. | become concentrated in organisms high on the
food chain. | d. | possess the greatest chemical toxicity. |
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19.
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Biological mechanisms of pest control include all of the following
except
a. | making male insects infertile with X rays. | b. | releasing
Bacillus thuringiensis to control insect larvae. | c. | breeding plants with
natural defenses. | d. | applying an organophosphate chemical with a
short half-life. |
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20.
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Products obtained from livestock include
a. | leather, wool, eggs, meat, and manure. | b. | cotton, linen, and nylon. | c. | wood and
plastic. | d. | All of the above |
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21.
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Earth’s available arable land is being reduced by
a. | fast-growing human populations. | c. | desertification. | b. | soil erosion. | d. | All of the
above |
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22.
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Erosion is most likely when the soil is
a. | bare and exposed to wind and rain. | b. | plowed along the contour of the
land. | c. | covered with grass. | d. | planted to
forest. |
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23.
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Plowing with machines, irrigating with drip systems, and _____ are all modern
agricultural methods.
a. | using manure | c. | irrigating with ditches | b. | applying chemical
fertilizers | d. | Both (a) and
(b) |
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24.
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Integrated pest management can include chemical pest control, _____, and a mix
of farming methods.
a. | frequent tilling | c. | biological pest control | b. | aquaculture | d. | All of the above |
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25.
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Genetic engineering of food crops
a. | continues to be debated among scientists. | b. | is only used with
corn. | c. | must be disclosed on food ingredient labels. | d. | Both (a) and
(c) |
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