Question 1

What is the evaporation of water from plant tissues called?

Accepted Answer

A)  guttation 
B)  root pressure 
C)  transpiration 
D)  cohesion-tension 
A)  guttation 
B)  root pressure 
C)  transpiration 
D)  cohesion-tension

Question 2

What does water potential refer to?

Accepted Answer

A)  a relative value that is defined in reference to distilled water at atmospheric pressure of 10 MPa 
B)  a relative value that is defined in reference to pure water at atmospheric pressure of 10 MPa 
C)  a relative value that is defined in reference to pure water at atmospheric pressure of 0 MPa 
D)  a relative value that is defined in reference to distilled water at atmospheric pressure of 0 MPa 
A)  a relative value that is defined in reference to distilled water at atmospheric pressure of 10 MPa 
B)  a relative value that is defined in reference to pure water at atmospheric pressure of 10 MPa 
C)  a relative value that is defined in reference to pure water at atmospheric pressure of 0 MPa 
D)  a relative value that is defined in reference to distilled water at atmospheric pressure of 0 MPa

Question 3

Which of the following should you expect to find in a living plant cell in a living plant?

Accepted Answer

A)  a cytoplasm that is much more positively charged than the fluid outside the cell 
B)  a cytoplasm that is much more negatively charged than the fluid outside the cell 
C)  a cytoplasm that is slightly more negatively charged than the fluid outside the cell 
D)  a cytoplasm that is slightly more positively charged than the fluid outside the cell 
A)  a cytoplasm that is much more positively charged than the fluid outside the cell 
B)  a cytoplasm that is much more negatively charged than the fluid outside the cell 
C)  a cytoplasm that is slightly more negatively charged than the fluid outside the cell 
D)  a cytoplasm that is slightly more positively charged than the fluid outside the cell

Question 4

What does tonoplast refer to?

Accepted Answer

A)  the plant nuclear envelope 
B)  the cell wall 
C)  a chloroplast 
D)  the vacuolar membrane 
A)  the plant nuclear envelope 
B)  the cell wall 
C)  a chloroplast 
D)  the vacuolar membrane

Question 5

What has the strongest effect on whether stomata are open or closed?

Accepted Answer

A)  O2 concentration 
B)  CO2 concentration 
C)  light 
D)  ion concentrations in the xylem 
A)  O2 concentration 
B)  CO2 concentration 
C)  light 
D)  ion concentrations in the xylem

Question 6

Which phrase best describes "honeydew"?

Accepted Answer

A)  phloem sap leaving the anus of an aphid 
B)  phloem sap harvested as syrup 
C)  xylem sap separated from syrup 
D)  xylem sap forced out of the margins of leaves 
A)  phloem sap leaving the anus of an aphid 
B)  phloem sap harvested as syrup 
C)  xylem sap separated from syrup 
D)  xylem sap forced out of the margins of leaves

Question 7

What is the $\varPsi$p of a living plant cell that has $\varPsi$= -0.2 MPa and $\varPsi$s = -0.4 MPa?

Accepted Answer

A) $\varPsi$p = -0.6 MPa 
B)  $\varPsi$p = 0.08 MPa 
C) $\varPsi$p = 0.2 MPa 
D)  $\varPsi$p = 0.5 MPa 
A) $\varPsi$p = -0.6 MPa 
B)  $\varPsi$p = 0.08 MPa 
C) $\varPsi$p = 0.2 MPa 
D)  $\varPsi$p = 0.5 MPa

Question 8

When solutes are unloaded from phloem, what happens to water?

Accepted Answer

A)  It is pumped out of the phloem by active transport. 
B)  It is pumped into the phloem by active transport. 
C)  It leaves the xylem by osmosis. 
D)  It leaves the phloem by osmosis. 
A)  It is pumped out of the phloem by active transport. 
B)  It is pumped into the phloem by active transport. 
C)  It leaves the xylem by osmosis. 
D)  It leaves the phloem by osmosis.

Question 9

Which sentence best describes how mineral ions are absorbed by plants?

Accepted Answer

A)  They are moved into the symplast via facilitated diffusion. 
B)  They are moved into the apoplast via bulk flow. 
C)  They are moved into the symplast via active transport. 
D)  They are moved into the apoplast via facilitated diffusion. 
A)  They are moved into the symplast via facilitated diffusion. 
B)  They are moved into the apoplast via bulk flow. 
C)  They are moved into the symplast via active transport. 
D)  They are moved into the apoplast via facilitated diffusion.

Question 10

What drives the process of transpiration?

Accepted Answer

A)  upward pressure as sugar is forced into the roots 
B)  evaporation 
C)  pumping by the xylem cells 
D)  passive transport 
A)  upward pressure as sugar is forced into the roots 
B)  evaporation 
C)  pumping by the xylem cells 
D)  passive transport

Question 11

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all.
-cohesion-tension mechanism

Accepted Answer

A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem 
A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem

Question 12

Which term best describes the movement of NH4+ ions into a cell down an electrochemical gradient?

Accepted Answer

A)  a symport 
B)  passive diffusion 
C)  facilitated diffusion 
D)  active transport 
A)  a symport 
B)  passive diffusion 
C)  facilitated diffusion 
D)  active transport

Question 13

Consider a living plant cell in a living leaf that has higher water potential than the fluids surrounding the cell. What would happen to the water?

Accepted Answer

A)  There would be no net flow of water into or out of the cell. 
B)  There would be a gain of water by the cell only if the cell's pressure potential is low enough. 
C)  There would be a net flow of water out of the cell. 
D)  There would be a gain of water by the cell only if the cell's pressure potential is high enough. 
A)  There would be no net flow of water into or out of the cell. 
B)  There would be a gain of water by the cell only if the cell's pressure potential is low enough. 
C)  There would be a net flow of water out of the cell. 
D)  There would be a gain of water by the cell only if the cell's pressure potential is high enough.

Question 14

How does loading of most carbohydrates into companion cells at a source occur?

Accepted Answer

A)  by diffusion of water from the xylem 
B)  by osmosis 
C)  by active transport 
D)  by proton pumping 
A)  by diffusion of water from the xylem 
B)  by osmosis 
C)  by active transport 
D)  by proton pumping

Question 15

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all.
-primary transport of ions from leaves

Accepted Answer

A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem 
A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem

Question 16

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all.
-dead cells throughout conducting portions

Accepted Answer

A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem 
A) xylem 
B) phloem 
C) both xylem and phloem 
D) neither xylem nor phloem

Question 17

Under which conditions would essentially no transpiration be expected to occur?

Accepted Answer

A)  near freezing air temperature 
B)  hot air temperature and no winds 
C)  brisk winds 
D)  100% relative humidity 
A)  near freezing air temperature 
B)  hot air temperature and no winds 
C)  brisk winds 
D)  100% relative humidity

Question 18

What is the principal driving force for movement of water into and through the plant shoot?

Accepted Answer

A)  upward pressure as sugar is forced into the roots 
B)  pumping by the xylem cells 
C)  passive transport 
D)  transpirational pull 
A)  upward pressure as sugar is forced into the roots 
B)  pumping by the xylem cells 
C)  passive transport 
D)  transpirational pull

Question 19

Explain the process that occurs when a stoma goes from closed to open.

Accepted Answer

When triggered by items such as blue lig

Question 20

Which ion is pumped into guard cells in order to make them more flaccid?

Accepted Answer

A)  Na+ 
B)  Ca2+ 
C)  K+ 
D)  H+ 
A)  Na+ 
B)  Ca2+ 
C)  K+ 
D)  H+

Exam 34: Transport in Plants

What is the evaporation of water from plant tissues called?

What does water potential refer to?

Which of the following should you expect to find in a living plant cell in a living plant?

What does tonoplast refer to?

What has the strongest effect on whether stomata are open or closed?

Which phrase best describes "honeydew"?

What is the Ψ\varPsiΨ p of a living plant cell that has Ψ\varPsiΨ = -0.2 MPa and Ψ\varPsiΨ s = -0.4 MPa?

When solutes are unloaded from phloem, what happens to water?

Which sentence best describes how mineral ions are absorbed by plants?

What drives the process of transpiration?

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all. -cohesion-tension mechanism

Which term best describes the movement of NH4+ ions into a cell down an electrochemical gradient?

Consider a living plant cell in a living leaf that has higher water potential than the fluids surrounding the cell. What would happen to the water?

How does loading of most carbohydrates into companion cells at a source occur?

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all. -primary transport of ions from leaves

Match each term or phrase with the letter of the associated plant tissue. Each letter may be used once, more than once, or not at all. -dead cells throughout conducting portions

Under which conditions would essentially no transpiration be expected to occur?

What is the principal driving force for movement of water into and through the plant shoot?

Explain the process that occurs when a stoma goes from closed to open.

Which ion is pumped into guard cells in order to make them more flaccid?

Light and Life

The Cell: an Overview

Energy and Enzymes

Cell Membranes and Signaling

Cellular Respiration

Photosynthesis

Cell Cycles

Genetic Recombination

The Chromosomal Basis of Mendelian Inheritance

Genetic Linkage, Sex-Linkage, and Other Non-Mendelian Inheritance Mechanisms

DNA Structure, Replication, and Repair

Gene Structure Expression, and Mutation

Regulation of Gene Expression

Dna Technologies

Genomes

Evolution: the Development of the Theory

Microevolution: Changes Within Populations

Speciation and Macroevolution

Systematics and Phylogenetics: Revealing the Tree of Life

Humans and Evolution

Defining Life and Its Origins

Viruses, Viroids, and Prions: Infectious Biological Particles

Bacteria and Archaea

Protists

Fungi

Plants

Animals

Conservation of Biodiversity

Population Ecology

Species Interactions and Community Ecology

Ecosystems

Animal Behaviour

Organization of the Plant Body

Reproduction and Development in Flowering Plants

Plant Nutrition

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Animal Nutrition

Gas Exchange: the Respiratory System

Internal Transport: the Circulatory System

Regulation of the Internal Environment: Water, Solutes, and Temperature

Control of Animal Processes: Endocrine Control

Animal Reproduction

Control of Animal Processes: Neural Control

Muscles, Skeletons, and Body Movements

Filters

What is the $\varPsi$ _p of a living plant cell that has $\varPsi$ = -0.2 MPa and $\varPsi$ _s = -0.4 MPa?

Which term best describes the movement of NH₄₊ ions into a cell down an electrochemical gradient?