Question 1

All energy that is consumed in food is synthesized by ________.

Accepted Answer

A) producers 
B) consumers 
C) herbivores 
D) decomposers 
E) all of the above 
A) producers 
B) consumers 
C) herbivores 
D) decomposers 
E) all of the above

Question 2

What is the leading cause of malnutrition?

Accepted Answer

A) lack of social infrastructure to distribute food 
B) lack of food 
C) lack of nutritious food 
D) lack of soil nutrients to provide adequate crop yield 
E) none of the above 
A) lack of social infrastructure to distribute food 
B) lack of food 
C) lack of nutritious food 
D) lack of soil nutrients to provide adequate crop yield 
E) none of the above

Question 3

The use of tractors and other heavy farm machinery compacts soil. How might this compacting affect soil fertility?

Accepted Answer

A) The soil fertility is harmed because the weight of the heavy machinery squeezes out the water. 
B) The increased pressure causes fertilizer molecules to react with one another, which has the effect of harming soil fertility. 
C) Once compacted the soil is not able to hold water and air, which harms the fertility. 
D) The weight of the heavy machinery kills decomposers, such as worms, which has the effect of harming soil fertility. 
A) The soil fertility is harmed because the weight of the heavy machinery squeezes out the water. 
B) The increased pressure causes fertilizer molecules to react with one another, which has the effect of harming soil fertility. 
C) Once compacted the soil is not able to hold water and air, which harms the fertility. 
D) The weight of the heavy machinery kills decomposers, such as worms, which has the effect of harming soil fertility.

Question 4

Why do soils that contain a high percentage of clay retain plant nutrients so well?

Accepted Answer

A) The ions of clay tend to be positively charged while nutrients tend to be negatively charged. 
B) Water cannot penetrate through clay very well, which means that nutrients are not readily washed away. 
C) Clay contains many magnetic particles, which have the effect of holding onto the nutrients. 
D) Because of a lack of water, the nutrients are not dissolved, which means they adhere as a solid to the clay particles. 
A) The ions of clay tend to be positively charged while nutrients tend to be negatively charged. 
B) Water cannot penetrate through clay very well, which means that nutrients are not readily washed away. 
C) Clay contains many magnetic particles, which have the effect of holding onto the nutrients. 
D) Because of a lack of water, the nutrients are not dissolved, which means they adhere as a solid to the clay particles.

Question 5

Thoroughly dried dead plant material is 44.4 percent oxygen by weight. How is this oxygen held in the plant so that it doesn't escape into the atmosphere?

Accepted Answer

A) This oxygen is held within cellulose micropores of the plant tissue. 
B) This oxygen is found mostly as carbon dioxide, which is heavier than air. 
C) This oxygen is not gaseous   , but oxygen atoms bound to the cellulose structure. 
D) Plants fix this oxygen during photosynthesis. 
A) This oxygen is held within cellulose micropores of the plant tissue. 
B) This oxygen is found mostly as carbon dioxide, which is heavier than air. 
C) This oxygen is not gaseous   , but oxygen atoms bound to the cellulose structure. 
D) Plants fix this oxygen during photosynthesis.

Question 6

Eating which of the following foods would make you a primary consumer?

Accepted Answer

A) lentils 
B) chicken 
C) shark steak 
D) all of the above 
E) none of the above 
A) lentils 
B) chicken 
C) shark steak 
D) all of the above 
E) none of the above

Question 7

Which of the following is considered the smallest rock particle found in soil?

Accepted Answer

A) clay 
B) silt 
C) sand 
D) humus 
E) subsoil 
A) clay 
B) silt 
C) sand 
D) humus 
E) subsoil

Question 8

What is the safest and most beneficial way to control weeds?

Accepted Answer

A) plowing them under the soil where they can decompose 
B) massive amounts of insecticide 
C) massive amounts of herbicide 
D) all of the above 
E) A and B only 
A) plowing them under the soil where they can decompose 
B) massive amounts of insecticide 
C) massive amounts of herbicide 
D) all of the above 
E) A and B only

Question 9

How are trophic structures related to the food chain?

Accepted Answer

A) They are the same. 
B) Trophic structures are the food digesting organelle. 
C) The food chain is a small, incomplete portion of the trophic structure. 
D) The trophic structure is a small, incomplete portion of the food chain. 
E) none of the above 
A) They are the same. 
B) Trophic structures are the food digesting organelle. 
C) The food chain is a small, incomplete portion of the trophic structure. 
D) The trophic structure is a small, incomplete portion of the food chain. 
E) none of the above

Question 10

What are the major natural sources of phosphorus used by plants?

Accepted Answer

A) It is extracted from rocks as phosphate anion. 
B) It is formed by atmospheric reaction of phosphorus and oxygen during lightning strikes. 
C) It is converted from elemental phosphorus by specialized bacteria in the roots of plants. 
D) all of the above 
E) only A and B 
A) It is extracted from rocks as phosphate anion. 
B) It is formed by atmospheric reaction of phosphorus and oxygen during lightning strikes. 
C) It is converted from elemental phosphorus by specialized bacteria in the roots of plants. 
D) all of the above 
E) only A and B

Question 11

Distinguish between organic farming and integrated crop management.

Accepted Answer

A) Only organic farming aims for environmentally-friendly methods of farming. 
B) Organic farming tends not to embrace high technology, while ICM does. 
C) Only integrated crop management allows for the use of fertilizers. 
D) Organic farming is more geared towards large scale production of food. 
A) Only organic farming aims for environmentally-friendly methods of farming. 
B) Organic farming tends not to embrace high technology, while ICM does. 
C) Only integrated crop management allows for the use of fertilizers. 
D) Organic farming is more geared towards large scale production of food.

Question 12

Which of the following is a straight fertilizer?

Accepted Answer

A) NH3 
B) KNO3 
C) (NH4)3PO4 
D) All of the above are straight fertilizers. 
E) These are all synthetic fertilizers. 
A) NH3 
B) KNO3 
C) (NH4)3PO4 
D) All of the above are straight fertilizers. 
E) These are all synthetic fertilizers.

Question 13

Why is flooding not an efficient method of irrigation?

Accepted Answer

A) Most of the water is lost due to run off and evaporation. 
B) The water drowns the roots of the plants. 
C) Moist soil does not readily absorb any more water. 
D) Soil erosion is minimized because the flow of water is very slow. 
E) none of the above 
A) Most of the water is lost due to run off and evaporation. 
B) The water drowns the roots of the plants. 
C) Moist soil does not readily absorb any more water. 
D) Soil erosion is minimized because the flow of water is very slow. 
E) none of the above

Question 14

What is the approximate percentage of grain production in the U.S that is used for feeding livestock?

Accepted Answer

A) 70 percent 
B) 90 percent 
C) 50 percent 
D) 30 percent 
E) 10 percent 
A) 70 percent 
B) 90 percent 
C) 50 percent 
D) 30 percent 
E) 10 percent

Question 15

Which of the following soil horizons is the closest to the surface?

Accepted Answer

A) substratum 
B) subsoil 
C) topsoil 
D) bottom soil 
E) humus 
A) substratum 
B) subsoil 
C) topsoil 
D) bottom soil 
E) humus

All energy that is consumed in food is synthesized by ________.

What is the leading cause of malnutrition?

The use of tractors and other heavy farm machinery compacts soil. How might this compacting affect soil fertility?

Why do soils that contain a high percentage of clay retain plant nutrients so well?

Thoroughly dried dead plant material is 44.4 percent oxygen by weight. How is this oxygen held in the plant so that it doesn't escape into the atmosphere?

Eating which of the following foods would make you a primary consumer?

Which of the following is considered the smallest rock particle found in soil?

What is the safest and most beneficial way to control weeds?

How are trophic structures related to the food chain?

What are the major natural sources of phosphorus used by plants?

Distinguish between organic farming and integrated crop management.

Which of the following is a straight fertilizer?

Why is flooding not an efficient method of irrigation?

What is the approximate percentage of grain production in the U.S that is used for feeding livestock?

Which of the following soil horizons is the closest to the surface?

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Protection Water and Air Resources

Capturing Energy

Filters

Exam 15: Optimizing Food Production

All energy that is consumed in food is synthesized by ________.

What is the leading cause of malnutrition?

The use of tractors and other heavy farm machinery compacts soil. How might this compacting affect soil fertility?

Why do soils that contain a high percentage of clay retain plant nutrients so well?

Thoroughly dried dead plant material is 44.4 percent oxygen by weight. How is this oxygen held in the plant so that it doesn't escape into the atmosphere?

Eating which of the following foods would make you a primary consumer?

Which of the following is considered the smallest rock particle found in soil?

What is the safest and most beneficial way to control weeds?

How are trophic structures related to the food chain?

What are the major natural sources of phosphorus used by plants?

Distinguish between organic farming and integrated crop management.

Which of the following is a straight fertilizer?

Why is flooding not an efficient method of irrigation?

What is the approximate percentage of grain production in the U.S that is used for feeding livestock?

Which of the following soil horizons is the closest to the surface?

About Science

Particles of Matter

Elements of Chemistry

Subatomic Particles

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Protection Water and Air Resources

Capturing Energy

Filters