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1 | |
The most common dietary problem in rich countries is |
| | A) | iron deficiency. |
| | B) | overeating. |
| | C) | inadequate intake of vitamins. |
| | D) | inadequate intake of minerals. |
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2 | |
A diet with adequate calories but inadequate protein produces a disease condition called |
| | A) | scurvy. |
| | B) | kwashiorkor. |
| | C) | maraasmus. |
| | D) | anemia. |
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3 | |
A diet inadequate in iron produces a condition called |
| | A) | scurvy. |
| | B) | kwashiorkor. |
| | C) | marasmus. |
| | D) | anemia. |
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4 | |
The crops providing the majority of nutrients and calories for people are |
| | A) | sugar cane, rice, and wheat. |
| | B) | corn, wheat, and rice. |
| | C) | potatoes, wheat, and rice. |
| | D) | fish/seafood, potatoes, and rice. |
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5 | |
Nutritionists recommend that we eat twice as many servings of _______ as any other food group. |
| | A) | dairy products |
| | B) | vegetables |
| | C) | bread/cereal |
| | D) | meat |
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6 | |
Fish and other seafood |
| | A) | are an important source of protein for many people. |
| | B) | availability is being jeopardized by excessive fishing pressure on the majority of marine fisheries. |
| | C) | exploitation is often associated with habitat destruction. |
| | D) | are characterized by all of the above. |
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7 | |
Soil is composed of |
| | A) | mineral material. |
| | B) | partially decomposed plant and animal bodies. |
| | C) | air spaces. |
| | D) | all of the above. |
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8 | |
Humus is |
| | A) | composed of partly decayed organic matter. |
| | B) | helpful in water retention. |
| | C) | responsible for soil structure. |
| | D) | all of the above. |
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9 | |
Organisms that live in soil |
| | A) | actually hinder plant uptake of minerals. |
| | B) | while not critically important, do facilitate plant uptake of soil nutrients. |
| | C) | on balance have neither particularly helpful nor harmful effects. |
| | D) | are crucial to soil’s ability to produce food. |
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10 | |
Projections indicate that by 2025, world cropland per person will |
| | A) | decrease significantly. |
| | B) | remain essentially unchanged. |
| | C) | increase slightly. |
| | D) | increase significantly. |
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11 | |
________ accounts for the greatest amount of water use globally. |
| | A) | Manufacturing. |
| | B) | Food processing. |
| | C) | Sanitation. |
| | D) | Agriculture. |
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12 | |
Plants called high responders |
| | A) | outproduce conventional plants under optimal conditions. |
| | B) | require substantially more water and nutrients than other crop plants. |
| | C) | are more expensive for farmers to use than other plants. |
| | D) | are characterized by all of the above. |
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13 | |
Genetic engineering refers to the process of |
| | A) | moving genes from one type of organism to another. |
| | B) | carefully selecting pollinators for crop plants. |
| | C) | creating synthetic genes for favorable traits. |
| | D) | all of the above. |
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14 | |
Public skepticism about genetically modified crops includes fear that |
| | A) | since the new varieties are expensive, poor farmers may be driven out of farming. |
| | B) | genes resistant to antibiotics might be passed to bacteria. |
| | C) | unsafe food products can result. |
| | D) | all of the above could occur. |
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15 | |
Genes for natural pesticides that are toxic to potato bugs have recently been transferred into potato plants making the plants lethal to these bugs. A main concern is that |
| | A) | these genes will escape from potatoes and disrupt other natural ecosystem functions. |
| | B) | these genes will mutate to become lethal to the potato plants that contain them. |
| | C) | natural selection will rapidly produce strains of potato bugs that are immune to the toxin in the plant. |
| | D) | the cost to farmers will exceed the benefits. |
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16 | |
Farmers using the new varieties of potatoes are being urged to plant nonresistant potatoes in part of their fields in order to |
| | A) | reduce the cost of putting in the crop. |
| | B) | keep pesticide companies in business. |
| | C) | perpetuate nonresistant genes in future generations of potato bugs. |
| | D) | confuse potato bugs. |
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17 | |
Compared to high intensity industrial agriculture, sustainable agriculture would involve |
| | A) | reduced use of pesticides. |
| | B) | more crop rotation. |
| | C) | less inorganic fertilizer. |
| | D) | all of the above. |
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18 | |
A benefit to reduced tillage systems is that |
| | A) | energy consumption is lowered. |
| | B) | soil disturbance is reduced. |
| | C) | more plant debris is left on the surface where it can reduce erosion. |
| | D) | all of the above are benefits. |
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19 | |
World food production is losing ground, unable to keep up with our growing population. |
| | A) | True |
| | B) | False |
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20 | |
There are about 800 million people that are chronically hungry worldwide. |
| | A) | True |
| | B) | False |
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21 | |
People inadequately fed are especially vulnerable to death from disease. |
| | A) | True |
| | B) | False |
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22 | |
Famine is often a byproduct of political and civil strife in some parts of the world. |
| | A) | True |
| | B) | False |
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23 | |
Genetically modified crops are created by inserting genetic material from one species into another. |
| | A) | True |
| | B) | False |
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24 | |
Perhaps as much as one half of the cropland existing worldwide is losing soil faster than it is being regenerated. |
| | A) | True |
| | B) | False |
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25 | |
The problem of soil erosion has been largely eliminated in the U.S. |
| | A) | True |
| | B) | False |
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26 | |
Application of fertilizer above certain levels produces diminished returns. |
| | A) | True |
| | B) | False |
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27 | |
Transgenic plants are those that have had genes from other organisms incorporated into their cells. |
| | A) | True |
| | B) | False |
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28 | |
Significant public opposition has arisen in response to the use of transgenic crop plants. |
| | A) | True |
| | B) | False |
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2003 McGraw-Hill Higher Education