Question 1

The phenomenon of guttation is related to

Accepted Answer

A)  active transport. 
B)  osmosis. 
C)  root pressure. 
D)  transpiration. 
E)  translocation. 
A)  active transport. 
B)  osmosis. 
C)  root pressure. 
D)  transpiration. 
E)  translocation.

Question 2

The tendency for water to move toward greater solute concentration is an example of

Accepted Answer

A)  active transport. 
B)  osmolarity. 
C)  diffusion. 
D)  reverse osmosis. 
E)  passive transport. 
A)  active transport. 
B)  osmolarity. 
C)  diffusion. 
D)  reverse osmosis. 
E)  passive transport.

Question 3

Mineral nutrients enter the plant body directly from the environment by means of uptake

Accepted Answer

A)  through the roots. 
B)  by the leaves. 
C)  from digested food molecules. 
D)  into vascular tissue. 
E)  through the stems. 
A)  through the roots. 
B)  by the leaves. 
C)  from digested food molecules. 
D)  into vascular tissue. 
E)  through the stems.

Question 4

The transpiration-cohesion-tension mechanism explains how

Accepted Answer

A)  water is lost from leaf openings. 
B)  water is transported in the xylem. 
C)  water and minerals enter the root. 
D)  solutes are translocated within the phloem. 
E)  leaf epidermal cells minimize water loss. 
A)  water is lost from leaf openings. 
B)  water is transported in the xylem. 
C)  water and minerals enter the root. 
D)  solutes are translocated within the phloem. 
E)  leaf epidermal cells minimize water loss.

Question 5

The evaporative loss of water from the leaf is called

Accepted Answer

A)  translocation. 
B)  transformation. 
C)  transportation. 
D)  transpiration. 
E)  transcention. 
A)  translocation. 
B)  transformation. 
C)  transportation. 
D)  transpiration. 
E)  transcention.

Question 6

Water in the xylem is pulled up to replace water lost by evaporation because of the _______ of water molecules to water molecules. This physical property of water is the result of _______ bonding between water molecules.

Accepted Answer

The answer of Water in the xylem is pulled up...

Question 7

The movement of water in plants caused by differences in pressure potential is called

Accepted Answer

A)  osmosis. 
B)  passive transport. 
C)  diffusion. 
D)  active transport. 
E)  bulk flow. 
A)  osmosis. 
B)  passive transport. 
C)  diffusion. 
D)  active transport. 
E)  bulk flow.

Question 8

Use the following to answer questions :
Refer to the diagram below, depicting vascular tissue of a stem.  
-Is cell A or cell B the source cell?

Accepted Answer

The answer of Use the following to answer questions :
Refer...

Question 9

A plant cell placed in distilled water will

Accepted Answer

A)  expand until the osmotic potential reaches that of distilled water. 
B)  become more turgid until the osmotic potential reaches that of distilled water. 
C)  become less turgid until the osmotic potential reaches that of distilled water. 
D)  become more turgid until the pressure potential of the cell reaches its solute potential. 
E)  become less turgid until the pressure potential of the cell reaches the outside water potential. 
A)  expand until the osmotic potential reaches that of distilled water. 
B)  become more turgid until the osmotic potential reaches that of distilled water. 
C)  become less turgid until the osmotic potential reaches that of distilled water. 
D)  become more turgid until the pressure potential of the cell reaches its solute potential. 
E)  become less turgid until the pressure potential of the cell reaches the outside water potential.

Question 10

The wilting of plant tissue occurs when _______ is _______.

Accepted Answer

A)  water potential; high 
B)  turgor pressure; high 
C)  interior solute concentration; high 
D)  osmotic potential; high 
E)  turgor pressure; low 
A)  water potential; high 
B)  turgor pressure; high 
C)  interior solute concentration; high 
D)  osmotic potential; high 
E)  turgor pressure; low

Question 11

Where bulk flow occurs in plants, the liquid consists of

Accepted Answer

A)  water and minerals. 
B)  water and organic molecules. 
C)  organic molecules only. 
D)  water only. 
E)  Both a and b 
A)  water and minerals. 
B)  water and organic molecules. 
C)  organic molecules only. 
D)  water only. 
E)  Both a and b

Question 12

When osmotic _______ becomes more negative inside a cell, water moves into the cell passively by osmosis.

Accepted Answer

The answer of When osmotic _______ becomes more negative inside...

Question 13

The unbroken column of water from the roots to the highest leaves is kept intact by

Accepted Answer

A)  tension. 
B)  transpiration. 
C)  atmospheric pressure. 
D)  cohesion. 
E)  evaporation. 
A)  tension. 
B)  transpiration. 
C)  atmospheric pressure. 
D)  cohesion. 
E)  evaporation.

Question 14

As a tree begins transpiring in the morning, tension pressure occurs first in the

Accepted Answer

A)  leaves. 
B)  branches. 
C)  trunk. 
D)  roots. 
E)  All of the above 
A)  leaves. 
B)  branches. 
C)  trunk. 
D)  roots. 
E)  All of the above

Question 15

To initiate stomatal opening, K+ ions

Accepted Answer

A)  passively diffuse into guard cells. 
B)  passively diffuse out of guard cells. 
C)  are driven into guard cells by a charge gradient. 
D)  are actively transported out of guard cells. 
E)  bond to receptor sites on guard cell walls. 
A)  passively diffuse into guard cells. 
B)  passively diffuse out of guard cells. 
C)  are driven into guard cells by a charge gradient. 
D)  are actively transported out of guard cells. 
E)  bond to receptor sites on guard cell walls.

Question 16

Use the following to answer questions :
Refer to the diagram below, showing a cross section of a root.  
-Identify the structures labeled 1, 2, and 3.

Accepted Answer

(1) plasmodesmata; (

Question 17

Plasmodesmata allow materials to move by a(n) _______ route.

Accepted Answer

A)  apoplastic 
B)  symplastic 
C)  cohesive 
D)  bulk 
E)  electrical gradient 
A)  apoplastic 
B)  symplastic 
C)  cohesive 
D)  bulk 
E)  electrical gradient

Question 18

Water enters a plant mainly through its _______.

Accepted Answer

The answer of Water enters a plant mainly through its...

Question 19

Stomata

Accepted Answer

A)  control the opening of guard cells. 
B)  release less water to the environment than do other parts of the epidermis. 
C)  open when CO2 levels inside the leaf are high. 
D)  do not respond to light. 
E)  close when water is being lost at too great a rate. 
A)  control the opening of guard cells. 
B)  release less water to the environment than do other parts of the epidermis. 
C)  open when CO2 levels inside the leaf are high. 
D)  do not respond to light. 
E)  close when water is being lost at too great a rate.

Question 20

Translocation is driven by osmosis caused by the _______ transport of sucrose into the _______.

Accepted Answer

A)  passive; phloem at a source 
B)  active; xylem 
C)  active; phloem at a source 
D)  active; phloem at a sink 
E)  passive; xylem 
A)  passive; phloem at a source 
B)  active; xylem 
C)  active; phloem at a source 
D)  active; phloem at a sink 
E)  passive; xylem

Exam 35: Transport in Plants

The phenomenon of guttation is related to

The tendency for water to move toward greater solute concentration is an example of

Mineral nutrients enter the plant body directly from the environment by means of uptake

The transpiration-cohesion-tension mechanism explains how

The evaporative loss of water from the leaf is called

Water in the xylem is pulled up to replace water lost by evaporation because of the _______ of water molecules to water molecules. This physical property of water is the result of _______ bonding between water molecules.

The movement of water in plants caused by differences in pressure potential is called

Use the following to answer questions : Refer to the diagram below, depicting vascular tissue of a stem. -Is cell A or cell B the source cell?

A plant cell placed in distilled water will

The wilting of plant tissue occurs when _______ is _______.

Where bulk flow occurs in plants, the liquid consists of

When osmotic _______ becomes more negative inside a cell, water moves into the cell passively by osmosis.

The unbroken column of water from the roots to the highest leaves is kept intact by

As a tree begins transpiring in the morning, tension pressure occurs first in the

To initiate stomatal opening, K+ ions

Use the following to answer questions : Refer to the diagram below, showing a cross section of a root. -Identify the structures labeled 1, 2, and 3.

Plasmodesmata allow materials to move by a(n) _______ route.

Water enters a plant mainly through its _______.

Stomata

Translocation is driven by osmosis caused by the _______ transport of sucrose into the _______.

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Filters

Water in the xylem is pulled up to replace water lost by evaporation because of the _ of water molecules to water molecules. This physical property of water is the result of _ bonding between water molecules.

The wilting of plant tissue occurs when _ is _.

To initiate stomatal opening, K⁺ ions

Translocation is driven by osmosis caused by the _ transport of sucrose into the _.