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1 | | The most common dietary problem in rich countries is |
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| | A) | iron deficiency. |
| | B) | overeating. |
| | C) | inadequate intake of vitamins. |
| | D) | inadequate intake of minerals. |
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2 | | Worldwide, the greatest food shortages are found in |
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| | A) | Eastern Europe. |
| | B) | Africa. |
| | C) | Central America. |
| | D) | South America. |
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3 | | A diet inadequate in iron produces a condition called |
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| | 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 |
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| | 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 | | New revisions in the food pyramid recommend |
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| | A) | increasing consumption of red meat. |
| | B) | increasing consumption of unsaturated plant oils. |
| | C) | increasing consumption of carbohydrates like pasta and potatoes. |
| | D) | decreasing consumption of nuts. |
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6 | | Fish and other seafood |
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| | A) | are an important source of protein for many people. |
| | B) | are increasingly being provided by aquaculture. |
| | 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 |
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| | 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 |
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| | 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 |
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| | 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 |
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| | 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. |
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| | A) | Manufacturing |
| | B) | Food processing |
| | C) | Sanitation |
| | D) | Agriculture |
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12 | | Plants called high responders |
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| | 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 |
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| | 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 |
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| | 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 |
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| | 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 such potatoes could plant nonresistant potatoes in part of their fields in order to |
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| | 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, low input sustainable agriculture would involve |
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| | 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 |
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| | 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. |
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| | A) | TRUE |
| | B) | FALSE |
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20 | | There are about 800 million people that are chronically hungry worldwide. |
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| | A) | TRUE |
| | B) | FALSE |
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21 | | People inadequately fed are especially vulnerable to death from disease. |
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| | 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. |
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| | A) | TRUE |
| | B) | FALSE |
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23 | | Genetically modified crops are created by inserting genetic material from one species into another. |
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| | 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. |
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| | A) | TRUE |
| | B) | FALSE |
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25 | | The problem of soil erosion has been largely eliminated in the U.S. |
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| | A) | TRUE |
| | B) | FALSE |
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26 | | Application of fertilizer above certain levels produces diminished returns. |
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| | A) | TRUE |
| | B) | FALSE |
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27 | | Transgenic plants are those that have had genes from other organisms incorporated into their cells. |
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| | A) | TRUE |
| | B) | FALSE |
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28 | | Significant public opposition has arisen in response to the use of transgenic crop plants. |
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| | A) | TRUE |
| | B) | FALSE |
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29 | | Micorrhizal symbiosis reveals fungi to be more damaging to plant growth than originally believed. |
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| | A) | TRUE |
| | B) | FALSE |