Question 1

Per Scholander placed plant stems in pressure chambers in order to measure

Accepted Answer

A)  tension. 
B)  cohesion. 
C)  adhesion. 
D)  osmosis. 
E)  turgor. 
A)  tension. 
B)  cohesion. 
C)  adhesion. 
D)  osmosis. 
E)  turgor.

Question 2

A plant wilts when

Accepted Answer

A)  the pressure potential is positive. 
B)  the pressure potential is negative. 
C)  water moves into the vacuole. 
D)  the stomata are closed. 
E)  there is excess water in the soil. 
A)  the pressure potential is positive. 
B)  the pressure potential is negative. 
C)  water moves into the vacuole. 
D)  the stomata are closed. 
E)  there is excess water in the soil.

Question 3

What would happen if the soil around a tall tree were contaminated by salt?

Accepted Answer

A)  The tree would continue to grow just as it had before the salt contamination. 
B)  The tree would become stronger because of the increase of minerals in the soil. 
C)  The tree would require less water to maintain a water potential gradient. 
D)  The tree could die because the soil water potential would be lower than that of the root. 
E)  The tree would create more xylem to accommodate the extra mineral load. 
A)  The tree would continue to grow just as it had before the salt contamination. 
B)  The tree would become stronger because of the increase of minerals in the soil. 
C)  The tree would require less water to maintain a water potential gradient. 
D)  The tree could die because the soil water potential would be lower than that of the root. 
E)  The tree would create more xylem to accommodate the extra mineral load.

Question 4

Which of the following statements about the apoplast (the transport route through intercellular spaces) is true?

Accepted Answer

A)  Osmosis of water is not involved. 
B)  Movement of materials is regulated by membranes. 
C)  Water and solutes can move by bulk flow. 
D)  Plasmodesmata are involved. 
E)  Water and solutes enter the stele via this channel. 
A)  Osmosis of water is not involved. 
B)  Movement of materials is regulated by membranes. 
C)  Water and solutes can move by bulk flow. 
D)  Plasmodesmata are involved. 
E)  Water and solutes enter the stele via this channel.

Question 5

Regulators of stomatal opening and closing work by activating the

Accepted Answer

A)  proton pump in guard cells. 
B)  proton pump in stomata. 
C)  sodium-potassium pump in guard cells. 
D)  sodium-potassium pump in stomata. 
E)  All of the above 
A)  proton pump in guard cells. 
B)  proton pump in stomata. 
C)  sodium-potassium pump in guard cells. 
D)  sodium-potassium pump in stomata. 
E)  All of the above

Question 6

Sugars pass from cell to cell in the leaf starting in the _______ of the mesophyll; they move through the _______ of other cells and finally pass into the _______ of the sieve tube element.

Accepted Answer

A)  symplast or apoplast; symplast; symplast 
B)  apoplast; apoplast; apoplast 
C)  symplast; symplast or apoplast; symplast 
D)  apoplast; symplast; symplast 
E)  apoplast; symplast; apoplast 
A)  symplast or apoplast; symplast; symplast 
B)  apoplast; apoplast; apoplast 
C)  symplast; symplast or apoplast; symplast 
D)  apoplast; symplast; symplast 
E)  apoplast; symplast; apoplast

Question 7

Describe the role of the proton pump in moving minerals into the root.

Accepted Answer

Plants rely on a proton pump for active

Question 8

Describe the pressure flow model of phloem transport.

Accepted Answer

The difference in solute concentration b

Question 9

Stomata begin to open when K+

Accepted Answer

A)  becomes concentrated, water enters guard cells, and the cells become turgid. 
B)  leaves guard cells and they become less turgid. 
C)  enters guard cells and they become less turgid. 
D)  leaves guard cells and they become turgid. 
E)  reaches equilibrium in guard cells and their surroundings. 
A)  becomes concentrated, water enters guard cells, and the cells become turgid. 
B)  leaves guard cells and they become less turgid. 
C)  enters guard cells and they become less turgid. 
D)  leaves guard cells and they become turgid. 
E)  reaches equilibrium in guard cells and their surroundings.

Question 10

Which of the following represents the correct ordering of the water potential of these root cells or regions, from least negative to most negative?

Accepted Answer

A)  Xylem, cortex apoplast, stele apoplast, soil next to root 
B)  Soil next to root, xylem, stele apoplast, cortex apoplast 
C)  Xylem, stele apoplast, cortex apoplast, soil next to root 
D)  Stele apoplast, cortex apoplast, xylem, soil next to root 
E)  Soil next to root, cortex apoplast, stele apoplast, xylem 
A)  Xylem, cortex apoplast, stele apoplast, soil next to root 
B)  Soil next to root, xylem, stele apoplast, cortex apoplast 
C)  Xylem, stele apoplast, cortex apoplast, soil next to root 
D)  Stele apoplast, cortex apoplast, xylem, soil next to root 
E)  Soil next to root, cortex apoplast, stele apoplast, xylem

Question 11

Stomatal opening and closing are regulated by

Accepted Answer

A)  abscisic acid levels. 
B)  light levels. 
C)  carbon dioxide concentrations. 
D)  All of the above 
E)  None of the above 
A)  abscisic acid levels. 
B)  light levels. 
C)  carbon dioxide concentrations. 
D)  All of the above 
E)  None of the above

Question 12

In addition to driving water transport, transpiration

Accepted Answer

A)  cools leaves. 
B)  conserves water. 
C)  consumes ATP. 
D)  provides the pressure gradient for phloem transport. 
E)  requires an enzyme for fast rates. 
A)  cools leaves. 
B)  conserves water. 
C)  consumes ATP. 
D)  provides the pressure gradient for phloem transport. 
E)  requires an enzyme for fast rates.

Question 13

Which of the following increases a plant's intake of CO2 for photosynthesis?

Accepted Answer

A)  Thick waxy cuticle 
B)  Loss of water vapor 
C)  Darkness 
D)  Electric imbalance 
E)  Open stomata 
A)  Thick waxy cuticle 
B)  Loss of water vapor 
C)  Darkness 
D)  Electric imbalance 
E)  Open stomata

Exam 35: Transport in Plants

Per Scholander placed plant stems in pressure chambers in order to measure

A plant wilts when

What would happen if the soil around a tall tree were contaminated by salt?

Which of the following statements about the apoplast (the transport route through intercellular spaces) is true?

Regulators of stomatal opening and closing work by activating the

Sugars pass from cell to cell in the leaf starting in the _______ of the mesophyll; they move through the _______ of other cells and finally pass into the _______ of the sieve tube element.

Describe the role of the proton pump in moving minerals into the root.

Describe the pressure flow model of phloem transport.

Stomata begin to open when K+

Which of the following represents the correct ordering of the water potential of these root cells or regions, from least negative to most negative?

Stomatal opening and closing are regulated by

In addition to driving water transport, transpiration

Which of the following increases a plant's intake of CO2 for photosynthesis?

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Signaling and Communication

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinent Dna and Biotechnology

Differential Gene Expression in Development

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Evidence and Mechanisms of Evolution

Reconstructing and Using Phylogenies

Species and Their Formation

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The History of Life on Earth

Bacteria and Archaea: the Prokaryotic Domains

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

Fungi: Recyclers, Pathogens, Parasites, and Plant Partners

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

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Regulation of Plant Growth

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

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The Mammalian Nervous System: Structure and Higher Function

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Sugars pass from cell to cell in the leaf starting in the ___ of the mesophyll; they move through the _ of other cells and finally pass into the _____ of the sieve tube element.

Stomata begin to open when K⁺

Which of the following increases a plant's intake of CO₂ for photosynthesis?