Question 1

The relationship between a plant and mycorrhizal fungi is best described as

Accepted Answer

A)  commensal.
B)  parasitic.
C)  mutualistic.
D)  competitive.E) C) and D)
F) B) and D)

Question 2

What is true of the guard cells shown in the right- hand panel of this figure?

Accepted Answer

A)  Water is entering these cells.
B)  Their turgor pressure is increasing.
C)  These cells are hypertonic to their immediate surrounding.
D)  These cells are hypotonic to their immediate surrounding.E) None of the above
F) All of the above

Question 3

Which of the following is most likely to be an epiphyte?

Accepted Answer

A)  a plant that captures insects
B)  a plant that parasitizes another plant
C)  a plant with a very deep root system
D)  a plant growing on the branches of another plantE) All of the above
F) C) and D)

Question 4

Much research is being done to increase the nitrogen- fixing ability of plants with root nodules.Why is this an important goal for agricultural researchers?

Accepted Answer

A)  By removing the bacteria from the root nodules,more fixed nitrogen will be available to the plants.
B)  Nitrogen is an essential component of the amino acids used to form protein.
C)  Increasing the nitrogen- fixing ability of plants will allow them to make better use of nitrogen fertilizers.
D)  Decreasing the size of nodules will allow plants to fix more nitrogen into their own molecules.E) B) and D)
F) A) and B)

Question 5

Most plants can absorb and use which of the following forms of nitrogen directly?

Accepted Answer

A)  nitrate and ammonium
B)  nitrate only
C)  ammonium and nitrogen gas
D)  nitrite and nitrateE) B) and C)
F) A) and D) A

Question 6

On a trip to the Southwest,you and a friend collect some seeds from a piñon,which is a type of pine tree.Your friend also gathers a small bagful of soil from under the piñon tree.Back home,both of you plant your seeds in commercial sterilized potting soil,but your friend adds a spoonful of the collected dirt to each of her pots.Her seedlings do better than yours.Which of the following is the likeliest reason?

Accepted Answer

A)  The soil from the Southwest probably contained fungi able to establish a mycorrhizal association with the seedlings' roots.
B)  The soil from the Southwest probably contained macronutrients missing from the potting mix.
C)  Pine seedlings are better adapted to the sandy soil of the Southwest than to commercial potting mix.
D)  The soil from the Southwest probably contained nitrogen- fixing bacteria that colonized the seedlings' root nodules.E) B) and C)
F) A) and D)

Question 7

A hot,dry summer will reduce crop yields in part because

Accepted Answer

A)  carbon dioxide uptake is reduced by the stomata closing to prevent excessive water loss.
B)  oxygen uptake is reduced by the stomata closing to prevent excessive water loss.
C)  the stomata of the plants stay open to help cool the leaves.
D)  carbon dioxide release is reduced by the stomata closing to prevent excessive water loss.E) C) and D)
F) A) and C)

Question 8

Why has drip irrigation been developed?

Accepted Answer

A)  Drip irrigation uses less water than traditional methods.
B)  Drip irrigation increases soil salinity.
C)  Drip irrigation increases soil erosion.
D)  Drip irrigation increases evaporation and drainage.E) A) and B)
F) C) and D)

Question 9

The sugar "sink" in roots is the result of

Accepted Answer

A)  active transport of mineral ions into xylem cells.
B)  absorption of water from the soil through epidermal cells.
C)  pull of gravity on sugar molecules.
D)  active transport of sugars from phloem to root cells.E) C) and D)
F) B) and C)

Question 10

Which of the following essential nutrients is most likely to leach from the soil?

Accepted Answer

A)  Mg2+
B)  K+
C)  NO3-
D)  Ca2+E) None of the above
F) C) and D) C

Question 11

Compared to conventional agriculture,organic farming

Accepted Answer

A)  uses fewer synthetic pesticides.
B)  increases crop yields.
C)  requires much less hands- on work.
D)  guarantees the safety and extra health benefits of food.E) B) and C)
F) None of the above

Question 12

Which of the following essential macronutrient for plants is obtained directly from the air?

Accepted Answer

A)  magnesium
B)  hydrogen
C)  carbon
D)  nitrogenE) A) and B)
F) B) and C)

Question 13

Legumes are frequently grown in rotation with primary field crops.What is the benefit in this?

Accepted Answer

A)  A greater amount of the primary crop can be harvested each year.
B)  Legumes decrease the amount of organic material in the soil.
C)  Nitrogen is added to the soil because of the legumes' symbiotic nitrogen- fixing bacteria.
D)  Soil erosion is reduced by frequent plowing.E) A) and B)
F) All of the above

Question 14

The pores that facilitate gas exchange in plant leaves are called

Accepted Answer

A)  plasmodesmata.
B)  guard cells.
C)  lenticels.
D)  stomata.E) B) and D)
F) B) and C)

Question 15

What force is responsible for the cohesiveness of water?

Accepted Answer

A)  osmosis
B)  ionic bonding
C)  negative pressure created by evaporation
D)  hydrogen bonding between water moleculesE) A) and B)
F) All of the above

Question 16

Which of the following would be most likely to cause stomata to open?

Accepted Answer

A)  Water molecules entering the stomatal pore.
B)  Sunrise on a clear morning.
C)  A cool night is setting in.
D)  Hot,dry weather,and strong winds.E) B) and D)
F) B) and C)

Question 17

Commercial inorganic fertilizers have greatly increased agricultural productivity.Which of the following is an advantage of using inorganic rather than organic fertilizers?

Accepted Answer

A)  Inorganic fertilizers increase the water- holding capacity of the soil.
B)  Nutrients are released faster from inorganic fertilizers.
C)  It is easier for plants to absorb nutrients in an inorganic form.
D)  Inorganic nutrients bind more tightly to soil particles.E) A) and B)
F) A) and C)

Question 18

If you examine the soil profile revealed by a fresh road cut through a grassy rise,which of the following features will you probably find in the B horizon?

Accepted Answer

A)  an abundance of worms and burrowing insects
B)  a predominance of slightly weathered rock and gravel
C)  an abundance of decomposing organic material
D)  an abundance of fine clay but not much organic materialE) All of the above
F) A) and D)

Question 19

Which of the following options lists the set of plant macronutrients that make up about 98% of a plant's dry weight?

Accepted Answer

A)  nitrogen,potassium,manganese,sulfur,copper,and phosphorus
B)  carbon,nitrogen,potassium,manganese,sulfur,and phosphorus
C)  carbon,oxygen,hydrogen,potassium,zinc,and copper
D)  carbon,oxygen,hydrogen,nitrogen,sulfur,and phosphorusE) B) and D)
F) A) and D)

Question 20

Which of the following options correctly lists the sequence of structures through which water passes into a root?

Accepted Answer

A)  guard cell,endodermis,cortex,xylem
B)  epidermis,cortex,endodermis,xylem
C)  root hair,xylem,endodermis,phloem
D)  root hair,cortex,xylem,endodermisE) All of the above
F) A) and B) B

Exam 32: Plant Nutrition and Transport

The relationship between a plant and mycorrhizal fungi is best described as

Correct Answer
verified

What is true of the guard cells shown in the right- hand panel of this figure?

Correct Answer
verified

Which of the following is most likely to be an epiphyte?

Correct Answer
verified

Much research is being done to increase the nitrogen- fixing ability of plants with root nodules.Why is this an important goal for agricultural researchers?

Correct Answer
verified

Most plants can absorb and use which of the following forms of nitrogen directly?

Correct Answer
verified
A

Correct Answer
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A hot,dry summer will reduce crop yields in part because

Correct Answer
verified

Why has drip irrigation been developed?

Correct Answer
verified

The sugar "sink" in roots is the result of

Correct Answer
verified

Which of the following essential nutrients is most likely to leach from the soil?

Correct Answer
verified
C

Compared to conventional agriculture,organic farming

Correct Answer
verified

Which of the following essential macronutrient for plants is obtained directly from the air?

Correct Answer
verified

Legumes are frequently grown in rotation with primary field crops.What is the benefit in this?

Correct Answer
verified

The pores that facilitate gas exchange in plant leaves are called

Correct Answer
verified

What force is responsible for the cohesiveness of water?

Correct Answer
verified

Which of the following would be most likely to cause stomata to open?

Correct Answer
verified

Commercial inorganic fertilizers have greatly increased agricultural productivity.Which of the following is an advantage of using inorganic rather than organic fertilizers?

Correct Answer
verified

If you examine the soil profile revealed by a fresh road cut through a grassy rise,which of the following features will you probably find in the B horizon?

Correct Answer
verified

Which of the following options lists the set of plant macronutrients that make up about 98% of a plant's dry weight?

Correct Answer
verified

Which of the following options correctly lists the sequence of structures through which water passes into a root?

Correct Answer
verified
B

Exam 32: Plant Nutrition and Transport

The relationship between a plant and mycorrhizal fungi is best described as

Correct AnswerverifiedShow Answer

What is true of the guard cells shown in the right- hand panel of this figure?

Correct AnswerverifiedShow Answer

Which of the following is most likely to be an epiphyte?

Correct AnswerverifiedShow Answer

Much research is being done to increase the nitrogen- fixing ability of plants with root nodules.Why is this an important goal for agricultural researchers?

Correct AnswerverifiedShow Answer

Most plants can absorb and use which of the following forms of nitrogen directly?

Correct AnswerverifiedA

Correct AnswerverifiedShow Answer

A hot,dry summer will reduce crop yields in part because

Correct AnswerverifiedShow Answer

Why has drip irrigation been developed?

Correct AnswerverifiedShow Answer

The sugar "sink" in roots is the result of

Correct AnswerverifiedShow Answer

Which of the following essential nutrients is most likely to leach from the soil?

Correct AnswerverifiedC

Compared to conventional agriculture,organic farming

Correct AnswerverifiedShow Answer

Which of the following essential macronutrient for plants is obtained directly from the air?

Correct AnswerverifiedShow Answer

Legumes are frequently grown in rotation with primary field crops.What is the benefit in this?

Correct AnswerverifiedShow Answer

The pores that facilitate gas exchange in plant leaves are called

Correct AnswerverifiedShow Answer

What force is responsible for the cohesiveness of water?

Correct AnswerverifiedShow Answer

Which of the following would be most likely to cause stomata to open?

Correct AnswerverifiedShow Answer

Commercial inorganic fertilizers have greatly increased agricultural productivity.Which of the following is an advantage of using inorganic rather than organic fertilizers?

Correct AnswerverifiedShow Answer

If you examine the soil profile revealed by a fresh road cut through a grassy rise,which of the following features will you probably find in the B horizon?

Correct AnswerverifiedShow Answer

Which of the following options lists the set of plant macronutrients that make up about 98% of a plant's dry weight?

Correct AnswerverifiedShow Answer

Which of the following options correctly lists the sequence of structures through which water passes into a root?

Correct AnswerverifiedB

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A

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C

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B