Question 1

The force created by imbibition of water by wooden structures can be used to split stones.

Accepted Answer

A) True 
 B)False  True

Question 2

Tension in the leaf xylem is due to the adhesive and cohesive properties of water as well as transpiration.

Accepted Answer

A) True 
 B)False  True

Question 3

In which of the following situations will the rate of transpiration increase, assuming that no other variable changes?

Accepted Answer

A)  An increase in the relative humidity. 
B)  The plant is under water stress. 
C)  The sun has just gone below the horizon (dusk). 
D)  The stomata are recessed below the surface of the leaf (stomatal crypts). 
E)  The air temperature increases. 
A)  An increase in the relative humidity. 
B)  The plant is under water stress. 
C)  The sun has just gone below the horizon (dusk). 
D)  The stomata are recessed below the surface of the leaf (stomatal crypts). 
E)  The air temperature increases. E

Question 4

Which of the following plays a role in plasmolysis?

Accepted Answer

A)  Water potential 
B)  Vacuole 
C)  Plasma membrane 
D)  Protoplasm 
E)  All of these answers are correct 
A)  Water potential 
B)  Vacuole 
C)  Plasma membrane 
D)  Protoplasm 
E)  All of these answers are correct

Question 5

A state of equilibrium is reached when molecules are evenly distributed in the space available to them.

Accepted Answer

A) True 
 B)False

Question 6

The primary force that enables water to move to the top of very tall trees is root pressure.

Accepted Answer

A) True 
 B)False

Question 7

More than 90% of the water entering most plants passes on through the plant.

Accepted Answer

A) True 
 B)False

Question 8

When humidity is high

Accepted Answer

A)  transpiration rates increase. 
B)  transpiration rates decrease. 
C)  transpiration ceases altogether. 
D)  leaves absorb moisture from the air. 
E)  stomata open wider. 
A)  transpiration rates increase. 
B)  transpiration rates decrease. 
C)  transpiration ceases altogether. 
D)  leaves absorb moisture from the air. 
E)  stomata open wider.

Question 9

Substances are absorbed and retained against a concentration gradient, through the expenditure of energy, by _____________________.

Accepted Answer

A)  active transport 
B)  passive transport 
C)  imbibition 
D)  osmosis 
E)  none of these answers are correct 
A)  active transport 
B)  passive transport 
C)  imbibition 
D)  osmosis 
E)  none of these answers are correct

Question 10

Pressure that develops within a living cell as a result of water entering the cell is called

Accepted Answer

A)  turgor. 
B)  osmosis. 
C)  plasmolysis. 
D)  transpiration. 
E)  water potential. 
A)  turgor. 
B)  osmosis. 
C)  plasmolysis. 
D)  transpiration. 
E)  water potential.

Question 11

During plasmolysis water leaves a cell's central vacuole.

Accepted Answer

A) True 
 B)False

Question 12

Which is an essential trace element in plants?

Accepted Answer

A)  Iron 
B)  Phosphorus 
C)  Copper 
D)  Sulfur 
E)  Nitrogen 
A)  Iron 
B)  Phosphorus 
C)  Copper 
D)  Sulfur 
E)  Nitrogen

Question 13

Guttation involves loss of water in liquid form from a leaf.

Accepted Answer

A) True 
 B)False

Question 14

Approximately how much water typically leaves the plant by transpiration?

Accepted Answer

A)  90% or more. 
B)  25% or less. 
C)  75%. 
D)  65%. 
E)  50%. 
A)  90% or more. 
B)  25% or less. 
C)  75%. 
D)  65%. 
E)  50%.

Question 15

If plasmolyzed cells are placed in fresh water before permanent damage is done, they can become turgid once more.

Accepted Answer

A) True 
 B)False

Question 16

Active transport is the reverse of transpiration.

Accepted Answer

A) True 
 B)False

Question 17

_______________ occurs when water forms hydrogen bonds with large organic molecules such as cellulose in living or dead tissues.

Accepted Answer

A)  Imbibition 
B)  Turgor pressure 
C)  Plasmolysis 
D)  Active transport 
E)  Guttation 
A)  Imbibition 
B)  Turgor pressure 
C)  Plasmolysis 
D)  Active transport 
E)  Guttation

Question 18

Liquid water is forced out of the leaf when leaf pores are closed at night in a process called

Accepted Answer

A)  transpiration. 
B)  translocation. 
C)  evaporation. 
D)  guttation. 
E)  diffusion. 
A)  transpiration. 
B)  translocation. 
C)  evaporation. 
D)  guttation. 
E)  diffusion.

Question 19

Most plants have their stomata closed during the day and open at night.

Accepted Answer

A) True 
 B)False

Question 20

The rise of water in plants is presently most satisfactorily explained by

Accepted Answer

A)  the pressure-flow hypothesis. 
B)  active transport. 
C)  imbibition. 
D)  bulk flow. 
E)  the cohesion-tension theory. 
A)  the pressure-flow hypothesis. 
B)  active transport. 
C)  imbibition. 
D)  bulk flow. 
E)  the cohesion-tension theory.

Exam 9: Water in Plants

The force created by imbibition of water by wooden structures can be used to split stones.

Tension in the leaf xylem is due to the adhesive and cohesive properties of water as well as transpiration.

In which of the following situations will the rate of transpiration increase, assuming that no other variable changes?

Which of the following plays a role in plasmolysis?

A state of equilibrium is reached when molecules are evenly distributed in the space available to them.

The primary force that enables water to move to the top of very tall trees is root pressure.

More than 90% of the water entering most plants passes on through the plant.

When humidity is high

Substances are absorbed and retained against a concentration gradient, through the expenditure of energy, by _____________________.

Pressure that develops within a living cell as a result of water entering the cell is called

During plasmolysis water leaves a cell's central vacuole.

Which is an essential trace element in plants?

Guttation involves loss of water in liquid form from a leaf.

Approximately how much water typically leaves the plant by transpiration?

If plasmolyzed cells are placed in fresh water before permanent damage is done, they can become turgid once more.

Active transport is the reverse of transpiration.

_______________ occurs when water forms hydrogen bonds with large organic molecules such as cellulose in living or dead tissues.

Liquid water is forced out of the leaf when leaf pores are closed at night in a process called

Most plants have their stomata closed during the day and open at night.

The rise of water in plants is presently most satisfactorily explained by

What Is Plant Biology

The Nature of Life

Cells

Tissues

Roots and Soils

Stems

Leaves

Flowers, Fruits, and Seeds

Plant Metabolism

Growth

Meiosis and Alternation of Generation

Genetics

Plant Breeding and Propagation

Evolution

Plant Names and Classification

Domain Kingdombacteria, Domain King-Domarchaea, and Viruses

Kingdom Protista

Kingdom Fungi

Introduction to the Plant Kingdom: Bryophytes

The Seedless Vascular Plants: Ferns and Their Relatives

Introduction to Seed Plants: Gymnosperms

Seed Plants: Angiosperms

Flowering Plants and Civilization

Ecology

Biomes

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