Question 1

It is well-documented that while some synthetc pesticides have caused great harm to living creatures, others have saved lives. Give a brief account of one that has, ironically, saved human lives: DDT.

Accepted Answer

Since 1945, it is estimated that DDT and...

Question 2

Which of the following problems with nutrition do you think is most prevalent in the United States?

Accepted Answer

A)   Malnutrition
B)   under nutrition
C)   Micronutrition
D)   chronic hunger
E)   OvernutritionF) D) and E)
G) C) and D)

Question 3

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

Accepted Answer

A)   Protein
B)   Carbohydrates
C)   vitamin A
D)   vitamin C
E)   IodineF) B) and D)
G) C) and D)

Question 4

The United States primarily uses ____________________ for food production.

Accepted Answer

industrial...

Question 5

Research shows that, on average, low-input polycultures produce higher crop yields than high-input monocultures.

Accepted Answer

A) True 
 B)False

Question 6

Which of the following is not one of the three major types of organic fertilizer?

Accepted Answer

A)   green manure
B)   sewage sludge
C)   compost
D)   animal manure
E)   All of these are major types of organic fertilizers.F) B) and D)
G) C) and E) B

Question 7

There are no technological substitutes for fertile and uncontaminated topsoil.

Accepted Answer

A) True 
 B)False  True

Question 8

Strains of genetically modified food crops can hybridize with wild crop varieties when

Accepted Answer

A)   The process is carefully controlled in an agricultural lab.
B)   Pollen blows from the genetically modified crop and spreads among wild varieties.
C)   Pollen is transferred by the farmer from one crop to the other.
D)   It is not possible for a genetically modified plant to hybridize with a wild species.
E)   More than one of these answers is correctF) C) and D)
G) B) and D)

Question 9

Which choice reflects the correct sequence of animal efficiency at converting grain into protein, from the most efficient animal to the least?

Accepted Answer

A)   fish, chicken, pigs, beef cattle
B)   chicken, fish, beef cattle, pigs
C)   pigs, chicken, fish, beef cattle
D)   beef cattle, fish, chicken, pigs
E)   These animals are all equally efficient at converting grain into protein.F) A) and B)
G) A) and C)

Question 10

A(n) ____________________ is a chemical used to control or kill populations of organisms that we consider undesirable such as insects, weeds, or rodents.

Accepted Answer

The answer of A(n) ____________________ is a chemical used to...

Question 11

It takes about one unit of nonrenewable fossil fuel energy to put one unit of food energy on the table.

Accepted Answer

A) True 
 B)False

Question 12

Explain the benefits of using perennial plants rather than annual plants for food crops.

Accepted Answer

Annual plants such as the grain crops wh...

Question 13

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

Accepted Answer

A)   20%
B)   30%
C)   50%
D)   60%
E)   70%F) B) and C)
G) B) and D)

Question 14

Which of the following terms does not belong with the others?

Accepted Answer

A)   organic food
B)   sustainable agriculture
C)   animals raised on 100% organic feed
D)   natural food
E)   label of 100% organicF) A) and E)
G) A) and C)

Question 15

The world's 30,000 known species of spiders

Accepted Answer

A)   kill more livestock with poisonous bites than any other threat.
B)   have to be controlled in order for integrated pest management to work properly
C)   are a threat not only to livestock, but also to rural farmers because they nest in sheds where equipment is stored and later retrieved.
D)   kill far more crop-eating insects every year than humans do by using chemicals.
E)   Are at the bottom of the food chain in agricultural settings and so provide important food for birds that control caterpillar populations.F) A) and C)
G) D) and E)

Question 16

Since 1942 the use of synthetic pesticides has increased 10-fold. In spite of this fact, food supply damage due to pests has increased during that time.

Accepted Answer

A) True 
 B)False

Question 17

Numerous practices have been developed to deter ____________________, including reducing or eliminating tillage, managing irrigation to reduce runoff, and keeping the soil covered with plants or mulch.

Accepted Answer

soil erosion

Question 18

Government subsidies to fishing fleets

Accepted Answer

A)   promote overfishing
B)   promote the reduction of aquatic biodiversity
C)   promote overfishing and reduction of aquatic biodiversity
D)   reduce the use of bottom-trawling harvests
E)   are currently less than $100,000 per yearF) C) and E)
G) C) and D)

Question 19

The majority of soil organic matter is concentrated in the

Accepted Answer

A)   O horizon of leaf litter
B)   A horizon of topsoil
C)   O and A horizons
D)   C horizon
E)   B horizonF) A) and D)
G) A) and E)

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 10: Food, Soil, and Pest Management

It is well-documented that while some synthetc pesticides have caused great harm to living creatures, others have saved lives. Give a brief account of one that has, ironically, saved human lives: DDT.

Correct AnswerverifiedSince 1945, it is estimated that DDT and...View AnswerShow Answer

Which of the following problems with nutrition do you think is most prevalent in the United States?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

The United States primarily uses ____________________ for food production.

Correct Answerverifiedindustrial...View AnswerShow Answer

Research shows that, on average, low-input polycultures produce higher crop yields than high-input monocultures.

Correct AnswerverifiedShow Answer

Which of the following is not one of the three major types of organic fertilizer?

Correct AnswerverifiedB

There are no technological substitutes for fertile and uncontaminated topsoil.

Correct AnswerverifiedTrue

Strains of genetically modified food crops can hybridize with wild crop varieties when

Correct AnswerverifiedShow Answer

Which choice reflects the correct sequence of animal efficiency at converting grain into protein, from the most efficient animal to the least?

Correct AnswerverifiedShow Answer

A(n) ____________________ is a chemical used to control or kill populations of organisms that we consider undesirable such as insects, weeds, or rodents.

Correct AnswerverifiedShow Answer

It takes about one unit of nonrenewable fossil fuel energy to put one unit of food energy on the table.

Correct AnswerverifiedShow Answer

Explain the benefits of using perennial plants rather than annual plants for food crops.

Correct AnswerverifiedAnnual plants such as the grain crops wh...View AnswerShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following terms does not belong with the others?

Correct AnswerverifiedShow Answer

The world's 30,000 known species of spiders

Correct AnswerverifiedShow Answer

Since 1942 the use of synthetic pesticides has increased 10-fold. In spite of this fact, food supply damage due to pests has increased during that time.

Correct AnswerverifiedShow Answer

Numerous practices have been developed to deter ____________________, including reducing or eliminating tillage, managing irrigation to reduce runoff, and keeping the soil covered with plants or mulch.

Correct Answerverifiedsoil erosion

Government subsidies to fishing fleets

Correct AnswerverifiedShow Answer

The majority of soil organic matter is concentrated in the

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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Since 1945, it is estimated that DDT and...
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industrial...
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B

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True

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Annual plants such as the grain crops wh...
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soil erosion

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