Question 1

Which of the following is NOT involved in mineral uptake by plant roots?

Accepted Answer

A)  cuticles that protect surfaces
B)  root nodules that fix atmospheric nitrogen
C)  root hairs that increase surface area
D)  expending energy in uptake/active transportE) B) and C)
F) B) and D)

Question 2

Which statement is NOT true about stomata?

Accepted Answer

A)  As guard cells become turgid,the stomata open.
B)  There are two guard cells around each stomata.
C)  Guard cells take up potassium ions and water enters the guard cells.
D)  The blue light component of sunlight is a signal that can cause stomata to close.
E)  Stomata open and close on a daily basis,even if kept in the dark,on a circadian rhythm.F) A) and B)
G) A) and C)

Question 3

When you have waxed your car,rainfall makes very large droplets that roll around on the hood.This property of the water molecule is known as

Accepted Answer

A)  adhesion.
B)  turgor pressure.
C)  cohesion.
D)  transpiration.
E)  negative pressure potential.F) A) and D)
G) A) and B)

Question 4

All of the following statements about the cohesion-tension model are true EXCEPT

Accepted Answer

A)  there is no expenditure of energy.
B)  it is a model of how water and minerals are transported in xylem.
C)  it is dependent on the cohesive and adhesive properties of water.
D)  tension created by transpiration in the leaves pulls water along the phloem from the roots hairs to the leaves.E) A) and D)
F) B) and C)

Question 5

If you cut a herbaceous stem and observe fluids continually seeping upward and out of the cut,it is most likely due to

Accepted Answer

A)  root pressure.
B)  turgor pressure.
C)  active transport by phloem.
D)  tension caused by transpiration.
E)  cohesion to the xylem walls.F) B) and E)
G) A) and B)

Question 6

How can researchers confirm that phloem moves from a source to a sink?

Accepted Answer

A)  They can observe aphids and cut off their beaks.
B)  They can study the cause of maple sap flow in producing syrup.
C)  They can observe the effects of girdling a tree below the level of the majority of leaves.
D)  They can use radioactive tracers to measure the flow of sap between two distances over time.
E)  They can observe the uptake of ink into the stem of celery.F) A) and B)
G) A) and C)

Question 7

Nitrogen is an essential nutrient for optimal plant growth because it is used to build

Accepted Answer

A)  nucleic acids.
B)  protein.
C)  mitochondria.
D)  DNA.
E)  All of these are correct.F) B) and D)
G) C) and D)

Question 8

Some scientists predict that the Earth will lose almost all of its topsoil by the middle of the next century.What factors are involved in the erosion of soil?

Accepted Answer

A)  deforestation
B)  desertization
C)  poor farming practices
D)  All of these factors cause erosion.E) C) and D)
F) B) and D)

Question 9

What is the main factor that will determine whether or not water can enter the root cells?

Accepted Answer

A)  A lower osmotic pressure in the root tissues than the soil solution
B)  Type of plant cells that are exposed to the water
C)  Volume of water available
D)  A higher osmotic pressure in the root tissues than the soil solutionE) A) and D)
F) A) and C)

Question 10

Which hypothesis is supported by the fact that cells of wilting leaves produce abscisic acid,which causes guard cells to close?

Accepted Answer

A)  Supports both hypothesis I and II.
B)  Supports only hypothesis I.
C)  Supports only hypothesis II.
D)  Supports neither hypothesis.E) A) and B)
F) A) and C)

Question 11

Stomata closure in darkened environment,at time zero,with air (0.03% CO2) or CO2-free airflow through leaf.(Note: A decrease in conductance indicates inactivation of the proton pump.)  2) or CO2-free airflow through leaf.(Note: A decrease in conductance indicates inactivation of the proton pump.)    A) Supports both hypothesis I and II. B) Supports only hypothesis I. C) Supports only hypothesis II. D) Supports neither hypothesis." class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  Supports both hypothesis I and II.
B)  Supports only hypothesis I.
C)  Supports only hypothesis II.
D)  Supports neither hypothesis.E) A) and C)
F) None of the above

Question 12

Stomata do not open when exposed to a narrow band of green light.

Accepted Answer

A)  Supports both hypothesis I and II.
B)  Supports only hypothesis I.
C)  Supports only hypothesis II.
D)  Supports neither hypothesis.E) All of the above
F) A) and C)

Question 13

Which force pushes water into the xylem as osmosis moves water into the root?

Accepted Answer

A)  water stress
B)  atmospheric pressure
C)  root pressure
D)  guttation
E)  transpirationF) B) and E)
G) None of the above

Question 14

The degree of erosion in the United States is best described by the following statement.

Accepted Answer

A)  There is a set amount of soil that was originally formed and erosion continually removes some of it; therefore,we will one day run out of topsoil due to erosion.
B)  Farmland soil is eroding faster than it is being formed.
C)  Removal of trees helps build up topsoil and prevents erosion.
D)  Soil forms at generally the same rate as soil erodes,so there is an overall balance just as worldwide precipitation equals evaporation; it is just not evenly spread across the landscape.E) B) and C)
F) A) and D)

Question 15

In the pressure-flow model of phloem transport,the sink is normally

Accepted Answer

A)  the stem.
B)  the roots.
C)  xylem.
D)  lenticels.E) C) and D)
F) A) and B)

Question 16

Which statement is NOT true about the pressure-flow model of phloem transport?

Accepted Answer

A)  Water is actively transported into phloem.
B)  Phloem has been measured moving at a velocity of 1 m an hour.
C)  Pressure is created in the phloem by the buildup of water and sugar.
D)  Sugar produced by photosynthesis is actively transported into phloem cells.
E)  Sugar is actively transported out of the phloem at a sink area such as the root.F) All of the above
G) B) and C)

Exam 25: Flowering Plants: Nutrition and Transport

Stomata closure in darkened environment,at time zero,with air (0.03% CO₂) or CO₂-free airflow through leaf.(Note: A decrease in conductance indicates inactivation of the proton pump.)

Correct Answer
verified

In the pressure-flow model of phloem transport,the sink is normally

Correct Answer
verified

Which force pushes water into the xylem as osmosis moves water into the root?

Correct Answer
verified

Which of the following is NOT involved in mineral uptake by plant roots?

Correct Answer
verified

Which statement is NOT true about the pressure-flow model of phloem transport?

Correct Answer
verified

Nitrogen is an essential nutrient for optimal plant growth because it is used to build

Correct Answer
verified

Which hypothesis is supported by the fact that cells of wilting leaves produce abscisic acid,which causes guard cells to close?

Correct Answer
verified

How can researchers confirm that phloem moves from a source to a sink?

Correct Answer
verified

Some scientists predict that the Earth will lose almost all of its topsoil by the middle of the next century.What factors are involved in the erosion of soil?

Correct Answer
verified

All of the following statements about the cohesion-tension model are true EXCEPT

Correct Answer
verified

Which statement is NOT true about stomata?

Correct Answer
verified

If you cut a herbaceous stem and observe fluids continually seeping upward and out of the cut,it is most likely due to

Correct Answer
verified

The degree of erosion in the United States is best described by the following statement.

Correct Answer
verified

When you have waxed your car,rainfall makes very large droplets that roll around on the hood.This property of the water molecule is known as

Correct Answer
verified

Stomata do not open when exposed to a narrow band of green light.

Correct Answer
verified

What is the main factor that will determine whether or not water can enter the root cells?

Correct Answer
verified

Exam 25: Flowering Plants: Nutrition and Transport

Stomata closure in darkened environment,at time zero,with air (0.03% CO2) or CO2-free airflow through leaf.(Note: A decrease in conductance indicates inactivation of the proton pump.)

Correct AnswerverifiedShow Answer

In the pressure-flow model of phloem transport,the sink is normally

Correct AnswerverifiedShow Answer

Which force pushes water into the xylem as osmosis moves water into the root?

Correct AnswerverifiedShow Answer

Which of the following is NOT involved in mineral uptake by plant roots?

Correct AnswerverifiedShow Answer

Which statement is NOT true about the pressure-flow model of phloem transport?

Correct AnswerverifiedShow Answer

Nitrogen is an essential nutrient for optimal plant growth because it is used to build

Correct AnswerverifiedShow Answer

Which hypothesis is supported by the fact that cells of wilting leaves produce abscisic acid,which causes guard cells to close?

Correct AnswerverifiedShow Answer

How can researchers confirm that phloem moves from a source to a sink?

Correct AnswerverifiedShow Answer

Some scientists predict that the Earth will lose almost all of its topsoil by the middle of the next century.What factors are involved in the erosion of soil?

Correct AnswerverifiedShow Answer

All of the following statements about the cohesion-tension model are true EXCEPT

Correct AnswerverifiedShow Answer

Which statement is NOT true about stomata?

Correct AnswerverifiedShow Answer

If you cut a herbaceous stem and observe fluids continually seeping upward and out of the cut,it is most likely due to

Correct AnswerverifiedShow Answer

The degree of erosion in the United States is best described by the following statement.

Correct AnswerverifiedShow Answer

When you have waxed your car,rainfall makes very large droplets that roll around on the hood.This property of the water molecule is known as

Correct AnswerverifiedShow Answer

Stomata do not open when exposed to a narrow band of green light.

Correct AnswerverifiedShow Answer

What is the main factor that will determine whether or not water can enter the root cells?

Correct AnswerverifiedShow Answer

Stomata closure in darkened environment,at time zero,with air (0.03% CO₂) or CO₂-free airflow through leaf.(Note: A decrease in conductance indicates inactivation of the proton pump.)

Correct Answer
verified

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