Question 1 CH 10

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12 Δεκ 2012 (πριν από 4 χρόνια και 9 μήνες)

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Question 1

CH 10


0.5 out of 0.5 points




Which of the following is the root cause of food insecurity?

Answer





Selected Answer:



poverty








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Which of the following is a micronutrient, which
without sufficient quantities in a diet can result in goiter?

Answer





Selected Answer:



iodine








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The term
malnutrition

refers to people who

Answer





Selected Answer:



suffer from lack of
protein and other key nutrients








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Administration of ____ could prevent the majority of blindness in developing countries in the world.

Answer





Selected Answer:



vitamin A capsules








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Anemia can be the result of a deficiency in

Answer





Selected Answer:



iron








Question 6

0.5 out of 0.5 points




The UNICEF program to sharply reduce childhood deaths from improper nutrition would include all of the following
except

Answer





Selected Answer:



discouraging breastfeeding








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The term
overnutrition

refers to people who

Answer





Selected Answer:



eat more than the basic minimum number of daily calories








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Rangelands produce approximately ____ of the world's food.

Answer





Selected Answer:



16%








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All of the following are grains that are among the world's major food crops
except

Answer





Selected Answer:



Soybean.








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Which of the
following is a characteristic of feedlots or animal factories associated with livestock production?

Answer








Selected Answer:



All of these are characteristics of these types of livestock production.





Question 11

0.5 out of 0.5 points




Which of the following types of agriculture is most characteristic of developing countries?

Answer





Selected Answer:



traditional agriculture








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Which of the following types of agriculture is
most characteristic of developed countries?

Answer





Selected Answer:



industrialized agriculture








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All of the following crops are commonly grown in plantation agriculture
except

Answer





Selected Answer:



corn








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Which of the following is a type of subsistence agriculture?

Answer





Selected Answer:



shifting cultivation on small plots in tropical forests








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Which of the following would not be used to describe polyculture?

Answer





Selected Answer:



The plot of land is left unmanaged for long periods of time.








Question 16

0.5 out of 0.5 points




Most soil
erosion is caused by

Answer





Selected Answer:



wind and moving water








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Currently, topsoil is eroding faster than it forms on about ____ of the world's croplands.

Answer





Selected Answer:



30
-
40%








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In many developing countries, poor farmers plow up marginal land in order to survive. The resulting soil erosion and
land degradation increases poverty. The relationship between poverty and soil

erosion is best described as a

Answer





Selected Answer:



destructive positive feedback cycle








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Soil in the United States is eroding about ____ times faster than it can form.

Answer





Selected Answer:



17








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Which of the following can lead to desertification?

Answer





Selected Answer:



all of these answers








Question 21

0.5 out of 0.5 points




Which of the
following is least likely to be caused by desertification?

Answer





Selected Answer:



salinization








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Salt buildup may

Answer





Selected Answer:



eventually make the land unproductive








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Which of the following best describes how the process of irrigation can lead to salinization of soils?

Answer





Selected
Answer:



Water associated with irrigation contains small amounts of dissolved
salts. Evaporation leaves
behind increasing concentrations of these salts.








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Which of the following is central to most of the efforts to conserve topsoil?

Answer





Selected Answer:



keeping the
soil covered by vegetation








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Conservation tillage

Answer





Selected Answer:



decreases erosion








Question 26

0.5 out of 0.5 points




Compared to conventional tillage, conservation
tillage

Answer





Selected Answer:



reduces fuel and tillage costs








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Which of the following statements is
false?

Conservation tillage

Answer





Selected Answer:



reduces the number of crops
that can be grown in an area in a year








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Which of the following practices both reduces erosion and increases soil fertility?

Answer





Selected Answer:



strip cropping








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Contour farming involves

Answer





Selected Answer:



plowing at right angles to slopes








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In alley cropping,

Answer





Selected Answer:



Crops are planted between hedgerows of trees or shrubs that are used for fruits or fuelwood.








Question 31

0.5 out of 0.5 points




Which of the following is
not

one of the three major types of organic fertilizer?

Answer





Selected
Answer:



sewage sludge








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The process

least

likely to conserve soil nutrients is

Answer





Selected Answer:



irrigation








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Commercial inorganic fertilizers commonly contain all of the following
except

Answer





Selected Answer:



iodine








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Which of the following effects is agriculture
least
likely to have on water
resources?

Answer





Selected Answer:



recharging of aquifers








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Agriculture as it is currently practiced can cause

Answer





Selected Answer:



all of these answers








Question 36

0.5 out of 0.5 points




The green revolution has relied upon each of the following
except

Answer





Selected Answer:



increasing the diversity of crops grown simultaneously on a plot of land








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Which of the following is probably the greatest limiting factor in the continued increase of crop production on a global
scale?

Answer





Selected Answer:



Insufficient water resources.








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What
proportion of food products sold on U.S. supermarket shelves contains some form of genetically engineered
crop?

Answer





Selected Answer:



two
-
thirds








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Through the use of genetic engineering, agricultural experts hope to increase food production with plants that do all of
the following
except

Answer





Selected Answer:



do not require light to produce their food








Question 40

0.5 out

of 0.5 points




Storing the world's varieties of seeds in seed banks, agricultural centers, and botanical gardens is
least
likely to be
constrained by

Answer





Selected Answer:



lack of knowledge about how to store seeds








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The production of a single 8 oz. piece of grain
-
fed beef requires the use of how many gallons of water? (Not including
water use for meat processing)

Answer





Selected Answer:



6600








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Which of the following is the most energy efficient to produce?

Answer





Selected Answer:



catfish








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It has been estimated that about ____ of the world's major fisheries

have been fished at or beyond their sustainable
level.

Answer





Selected Answer:



two
-
thirds








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Aquaculture supplies ____ of the world's commercial fish harvest.

Answer





Selected Answer:



one
-
third








Question 45

0.5 out of 0.5 points




About ____ of the marine fish harvest is used primarily as animal feed and fish meal.

Answer





Selected Answer:



35%








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____ is the
world leader in aquaculture.

Answer





Selected Answer:



China








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Fish ranching is useful for

Answer





Selected Answer:



salmon








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Which of
the following categories includes all of the others?

Answer





Selected Answer:



pesticides








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According to pesticide proponents, pesticides




Answer


Selected Answer:



all of these answers








Question 50

0.5 out of 0.5 points




Which of the following is a serious problem associated with the use of modern synthetic pesticides?

Answer





Selected Answer:



All of these.








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Some beneficial changes in pesticides and their use include all of the following
except

Answer





Selected Answer:



pesticides, which kill only the target pest and do no harm to any other species








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The ideal pesticide would

Answer





Selected Answer:



Kill only the target pest.








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A serious drawback to using chemicals to control pests is

Answer





Selected Answer:



all of these answers








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Since 1945, approximately ____ species of insects have developed resistance to one or more insecticides.

Answer





Selected Answer:



1,000








Question 55

0.5 out of 0.5 points




Broad
-
spectrum pesticides may increase the number of a pest species through

Answer





Selected Answer:



all of these answers are correct








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Which of the following approaches would be the

least

beneficial in trying to reduce insect damage?

Answer





Selected Answer:



planting monocultures








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Biological control

Answer





Selected Answer:



is often self
-
perpetuating once established








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Which of the following statements is
false?

Answer





Selected Answer:



Biological control is a good, quick fix.








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A pheromone is

Answer





Selected Answer:



a species
-
specific chemical sex attractant








Question 60

0.5 out of 0.5 points




Which of the following statements is a weakness of using pheromones?

Answer





Selected Answer:



They are costly and time
-
consuming
to produce in the laboratory.








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Pheromones

Answer





Selected Answer:



are not harmful to nontarget species








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A hormone is

Answer





Selected
Answer:



a chemical that controls an organism's growth and development








Que獴楯n 63

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Which of the following statements is
false
?

Answer





Selected Answer:



Insect development and metamorphosis are
controlled by pheromones.








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Integrated pest management ____ than pesticides.

Answer





Selected Answer:



requires more expert knowledge about individual pest
-
crop situations








Question 65

0.5 out of 0.5 points




Which of the following statements is
false
?

Answer





Selected Answer:



The goal of integrated pest control is the complete eradication of the pest.








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An integrated pest
management program attempts to

Answer





Selected Answer:



greatly reduce pre
-
harvest pest
-
induced crop losses








Que獴楯n 67

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Switching to integrated pest management

Answer





Selected Answer:



is
opposed by politically and economically powerful agricultural chemical companies








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Integrated pesticide management (IPM) could be promoted by all of the following strategies
except

Answer





Selected
Answer:



gradually phasing in subsidies for farmers who depend primarily on pesticides








Que獴楯n 69

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Sustainable agriculture is characterized by all of the following
except

Answer





Selected Answer:



promoting monoculture








Question 70

0.5 out of 0.5 points




Sustainable agriculture

Answer





Selected Answer:



minimizes soil erosion








Que獴楯n 71

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In order to switch to sustainable agriculture, which of the following practices would
not

be favorable?

Answer





Selected Answer:



Expand the use of the crops of the green revolution.







Question 72

0.5 out of 0.5 points




Food production
worldwide is now less than in previous decades.

Answer





Selected Answer:



False







Question 73

0.5 out of 0.5 points




Traditional subsistence farming techniques are less efficient than large
-
scale farming techniques.

Answer





Selected Answer:



True







Question 74

0 out of 0.5 points




People worldwide are unable to purchase or raise enough food to meet their nutritional needs.




Answer


Selected Answer:



True







Question 75

0.5 out of 0.5 points




There are sufficient food resources being produced to meet the basic nutritional requirements of every person on the
planet.

Answer





Selected Answer:



True







Question 76

0.5 out of 0.5 points




Overgrazing by cattle can ultimately result

in water pollution.

Answer





Selected Answer:



True







Question 77

0.5 out of 0.5 points




Plantation agriculture is used primarily to reduce soil erosion and restore soil fertility.

Answer





Selected Answer:



False







Question 78

0.5 out of 0.5 points




Over time, the extensive addition of water through irrigation practices can actually lead to desertification.

Answer





Selected Answer:



True







Question 79

0.5 out of 0.5 points




Traditional
agriculture is less productive but is practiced by almost half of the world's population.

Answer





Selected Answer:



True







Question 80

0.5 out of 0.5 points




Continual rotation of crops annually, switching between corn and legumes,
results in the depletion of soil nitrogen.

Answer





Selected Answer:



False







Question 81

0 out of 0.5 points




Economic growth in developing nations can result in an increased per capita consumption of meat, which can result in
an
increased reliance on grain imports.

Answer





Selected Answer:



False







Question 82

0.5 out of 0.5 points




A disadvantage to the green revolution is the intensive use of commercial inorganic fertilizers.

Answer





Selected Answer:



True







Question 83

0.5 out of 0.5 points




The value of the amount of food thrown away in U.S. households annually is estimated to be almost twice the amount
of money needed to eliminate global hunger and malnutrition.

Answer





Selected
Answer:



True







Question 84

0 out of 0.5 points




Compost is placed on soil surface to minimize soil erosion.

Answer





Selected Answer:



True







Question 85

0.5 out of 0.5 points




Pesticides have a positive benefit in terms of public health because fungi, insects, and noncrop plants can contaminate
crops with many natural toxins.

Answer





Selected Answer:



True







Question 86

0.5 out of 0.5 points




Malnourished
individuals may become more prone to infections, and eventually may develop a specific deficiency
disease.

Answer





Selected Answer:



True







Question 87

0 out of 0.5 points




The United States leads the world in both meat production and
consumption.

Answer





Selected Answer:



True







Question 88

0 out of 0.5 points




Farmers use alley cropping with row patterns nearly level around hills
--
not up and down
--
to dissuade soil erosion.

Answer





Selected Answer:



True







Question 89

0.5 out of 0.5 points




There is a direct relationship linking increased beef production and increasing global warming.

Answer





Selected Answer:



True







Question 90

0.5 out of 0.5 points




Per unit area, the
application of synthetic pesticides is higher on typical crop fields than it is on the average lawn.

Answer





Selected Answer:



False







Question 91

0.5 out of 0.5 points




The use of broad
-
spectrum chlorinated hydrocarbon compounds to
combat pest species has resulted in saving millions
of human lives.

Answer





Selected Answer:



True







Question 92

0.5 out of 0.5 points




Since 1942 the use of synthetic pesticides has increased 33
-
fold. In spite of this fact, food supply

damage due to pests
has increased during that time.

Answer





Selected Answer:



True







Question 93

0.5 out of 0.5 points




Some nations have experienced an increase in certain crop yields after greatly cutting pesticide use.

Answer





Selected Answer:



True







Question 94

0 out of 0.5 points





Answer





Question

Selected
Match

On the commercial fishing methods figure, choose the method that may be used to encircle and
trap tuna.


D.


choice
D

On the commercial fishing methods figure, choose the method that uses hundreds or thousands of
hooks on a fishing line.


B.


choice
B

On the commercial fishing methods figure, choose the letter that represents a large net pulled
behind a boat.


E.


c
hoice
E

On the commercial fishing methods figure, choose the method that uses a net and is the most
dangerous for sea turtles.


A.


choice
A

On the commercial fishing methods figure, choose the letter that represents the long strings that
pull a net
behind a boat.


C.


choice
C






DBACE