Question 1

Which of the following conducting cells are associated with xylem?

Accepted Answer

A)  tracheids & vessel elements
B)  sieve-tube members & companion cells
C)  vessel elements & companion cells
D)  sieve-tube members & vessel elements
E)  tracheids & sieve-tube membersF) A) and B)
G) A) and D)

Question 2

Which hypothesis is supported by the fact that stomates open when exposed to white light,a mixture of all colors of 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) None of the above
F) A) and B)

Question 3

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) C) and D)
G) B) and E)

Question 4

Stomate opening after illumination following eight hours in darkness: plant is Xanthium pennsylvanicum.

Accepted Answer

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

Question 5

Which type of soil is best able to retain calcium and potassium,preventing them from being leached away by runoff?

Accepted Answer

A)  clay
B)  humus
C)  sand
D)  All soils are equal in preventing leaching of minerals.
E)  None of these soils would prevent leaching of minerals.F) C) and D)
G) A) and D)

Question 6

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 B)
F) A) and D)

Question 7

The absence of which of the following micronutrient would inhibit the plants ability to form chlorophyll?

Accepted Answer

A)  Zinc
B)  Chlorine
C)  Magnesium
D)  Calcium
E)  ManganeseF) B) and D)
G) D) and E)

Question 8

Within a mycorrhizal relationship the fungi provide a greater surface area for mineral and water loss while the plant furnishes the fungi with sugars and amino acids.

Accepted Answer

A) True 
 B)False

Question 9

Because most roots need gaseous oxygen as well as liquid water,the best soil for agricultural plants is

Accepted Answer

A)  sand,since it has the greatest pore spaces.
B)  clay,since it holds onto water better than silt or sand.
C)  silt,because it is intermediate between sand and clay in size.
D)  loam,which is a mixture of all size soil particles,and therefore is able to hold water but drain well.
E)  All sizes of soil particles (sand,silt,clay) are equal in soil properties.F) A) and B)
G) A) and C)

Question 10

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

Accepted Answer

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

Question 11

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

Accepted Answer

A)  nucleic acids.
B)  protein.
C)  chlorophyll.
D)  All of the above are correct.
E)  Nucleic acids and proteins but not chlorophyll.F) A) and C)
G) A) and D)

Question 12

The transpiration rate in plants is increased by

Accepted Answer

A)  wind.
B)  elevated temperature.
C)  increased sunlight intensity.
D)  All of the choices increase the rate of transpiration.E) A) and B)
F) A) and C)

Question 13

The carbon needed to build organic compounds in plants comes from _______,while the hydrogen and oxygen comes from _________.

Accepted Answer

A)  oxygen in the atmosphere; hydrogen peroxide
B)  carbon dioxide; water
C)  carbohydrates; hydrogen and oxygen gasses in the atmosphere
D)  glucose; hydrochloric acidE) None of the above
F) A) and B)

Question 14

Which of the following particles are retained by clay soil and exchanged for hydrogen ions when plants take them up?

Accepted Answer

A)  calcium & potassium
B)  calcium & ammonium
C)  sodium & sulphur
D)  iron & boron
E)  calcium & copperF) B) and E)
G) A) and B)

Question 15

Soil consists of

Accepted Answer

A)  a mixture of soil particles of different sizes.
B)  both living organisms and decaying organic material.
C)  air and water.
D)  All of these are components that define soil.E) A) and D)
F) A) and B)

Question 16

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) None of the above
F) All of the above

Question 17

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) B) and E)
G) A) and E)

Question 18

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) All of the above
G) B) and D)

Question 19

Rhizobium bacteria live in root nodules and

Accepted Answer

A)  fix atmospheric nitrogen to NH4+ to build organic compounds.
B)  fix carbon dioxide so that the carbon may be used to build glucose.
C)  increase the surface area,thereby increasing the water absorbing capacity of the plant's roots.
D)  All of the above are true.E) A) and B)
F) A) and C)

Question 20

Stomate 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) B) and D)
F) B) and C)

Exam 25: Flowering Plants: Nutrition and Transport

Which hypothesis is supported by the fact that stomates open when exposed to white light,a mixture of all colors of light?

Correct AnswerverifiedShow Answer

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

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

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

The absence of which of the following micronutrient would inhibit the plants ability to form chlorophyll?

Correct AnswerverifiedShow Answer

Rhizobium bacteria live in root nodules and

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which type of soil is best able to retain calcium and potassium,preventing them from being leached away by runoff?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following conducting cells are associated with xylem?

Correct AnswerverifiedShow Answer

The carbon needed to build organic compounds in plants comes from _______,while the hydrogen and oxygen comes from _________.

Correct AnswerverifiedShow Answer

Stomate 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

Soil consists of

Correct AnswerverifiedShow Answer

Which of the following particles are retained by clay soil and exchanged for hydrogen ions when plants take them up?

Correct AnswerverifiedShow Answer

The transpiration rate in plants is increased by

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Stomate opening after illumination following eight hours in darkness: plant is Xanthium pennsylvanicum.

Correct AnswerverifiedShow Answer

Within a mycorrhizal relationship the fungi provide a greater surface area for mineral and water loss while the plant furnishes the fungi with sugars and amino acids.

Correct AnswerverifiedShow Answer

Because most roots need gaseous oxygen as well as liquid water,the best soil for agricultural plants is

Correct AnswerverifiedShow Answer

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The carbon needed to build organic compounds in plants comes from _,while the hydrogen and oxygen comes from ___.

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Stomate 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.)

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