Question 1

To encourage the formation of well-developed, heavily branched roots, you should treat cuttings with

Accepted Answer

A)  gibberellin. 
B)  abscisic acid. 
C)  auxin. 
D)  ethylene. 
A)  gibberellin. 
B)  abscisic acid. 
C)  auxin. 
D)  ethylene.

Question 2

Radish plants under insect attack

Accepted Answer

A)  rapidly fold their petioles together. 
B)  produce bitter chemicals and grow spines on their leaves. 
C)  release salicin, which is converted to salicylic acid within the insect. 
D)  produce the defensive toxin nicotine. 
A)  rapidly fold their petioles together. 
B)  produce bitter chemicals and grow spines on their leaves. 
C)  release salicin, which is converted to salicylic acid within the insect. 
D)  produce the defensive toxin nicotine.

Question 3

What caterpillar saliva-based chemical stimulates a corn plant to release an alarm signal?

Accepted Answer

A)  Salicin 
B)  Salicylic acid 
C)  Volicitin 
D)  Methyl salicylate 
E)  Florigen 
A)  Salicin 
B)  Salicylic acid 
C)  Volicitin 
D)  Methyl salicylate 
E)  Florigen

Question 4

A Native American tradition uses a ʺteaʺ made by soaking willow bark in water as a pain-reliever. Does it work? Why?

Accepted Answer

Yes, it works. The willow bark

Question 5

Which pigment is responsible for the phototropism responses of plants?

Accepted Answer

A)  Ethylene 
B)  Phytochrome 
C)  Chlorophyll 
D)  Auxin 
E)  Xanthophyll 
A)  Ethylene 
B)  Phytochrome 
C)  Chlorophyll 
D)  Auxin 
E)  Xanthophyll

Question 6

Ripening fruits are attached firmly to their trees, but once they are mature, the trees must release them. How does this happen?

Accepted Answer

A weak layer of tiss

Question 7

The phytochrome that is active and absorbs far-red light is

Accepted Answer

A)  Pa. 
B)  Pfr. 
C)  Pe. 
D)  Pr. 
A)  Pa. 
B)  Pfr. 
C)  Pe. 
D)  Pr.

Question 8

In seeds from northern areas, what plant hormone often needs to be removed to get them to germinate, and how can it be removed?

Accepted Answer

abscisic acid, which

Question 9

Seed germination is stimulated by

Accepted Answer

A)  gibberellin. 
B)  abscisic acid. 
C)  florigen. 
D)  cytokinin. 
E)  ethylene. 
A)  gibberellin. 
B)  abscisic acid. 
C)  florigen. 
D)  cytokinin. 
E)  ethylene.

Question 10

Ethylene

Accepted Answer

A)  stimulates seed germination. 
B)  promotes gravitropism. 
C)  causes phototropism. 
D)  prevents leaf senescence. 
E)  promotes leaf and fruit drop. 
A)  stimulates seed germination. 
B)  promotes gravitropism. 
C)  causes phototropism. 
D)  prevents leaf senescence. 
E)  promotes leaf and fruit drop.

Question 11

Cutting a hedge with a trimmer stimulates it to become bushy because

Accepted Answer

A)  removing the lateral buds results in apical dominance under the influence of cytokinins. 
B)  removing the apical meristems results in less auxin, which results in more lateral branch growth. 
C)  removing the apical meristems makes less ethylene, which stimulates lateral branches to grow. 
D)  removing the apical meristems makes more auxin, which stimulates lateral branch buds to grow. 
A)  removing the lateral buds results in apical dominance under the influence of cytokinins. 
B)  removing the apical meristems results in less auxin, which results in more lateral branch growth. 
C)  removing the apical meristems makes less ethylene, which stimulates lateral branches to grow. 
D)  removing the apical meristems makes more auxin, which stimulates lateral branch buds to grow.

Question 12

A scientist who claims to have discovered a new plant hormone must demonstrate that this compound is

Accepted Answer

A)  capable of stimulating differentiated cells to form meristem tissue. 
B)  needed by the plant as a major source of energy. 
C)  produced in large amounts. 
D)  formed in one part of the plant but has an effect in a different part. 
E)  made from cell proteins. 
A)  capable of stimulating differentiated cells to form meristem tissue. 
B)  needed by the plant as a major source of energy. 
C)  produced in large amounts. 
D)  formed in one part of the plant but has an effect in a different part. 
E)  made from cell proteins.

Question 13

__________induces dormancy in seeds and buds and causes stomata to close.

Accepted Answer

A)  Auxin 
B)  Ethylene 
C)  Cytokinin 
D)  Gibberellin 
E)  Abscisic acid 
A)  Auxin 
B)  Ethylene 
C)  Cytokinin 
D)  Gibberellin 
E)  Abscisic acid

Question 14

Gravitropism is a plantʹs

Accepted Answer

A)  response to stress-inducing situations. 
B)  directional response to gravity. 
C)  apical dominance. 
D)  ability to form an abscission layer, so that the fruits and leaves fall from the plant. 
E)  ability to grow only upward. 
A)  response to stress-inducing situations. 
B)  directional response to gravity. 
C)  apical dominance. 
D)  ability to form an abscission layer, so that the fruits and leaves fall from the plant. 
E)  ability to grow only upward.

Question 15

Which of these hormones causes cell elongation, promotes apical dominance, and stimulates root branching?

Accepted Answer

A)  Gibberellin 
B)  Cytokinin 
C)  Auxin 
D)  Abscisic acid 
E)  Ethylene 
A)  Gibberellin 
B)  Cytokinin 
C)  Auxin 
D)  Abscisic acid 
E)  Ethylene

Question 16

Suppose you have some seeds that refuse to germinate when placed in moist soil. What could you do to encourage the seeds to germinate?

Accepted Answer

A)  Boil them. 
B)  Treat them with gibberellin. 
C)  Treat them with abscisic acid. 
D)  Treat them with auxin. 
E)  Put them in direct sunlight. 
A)  Boil them. 
B)  Treat them with gibberellin. 
C)  Treat them with abscisic acid. 
D)  Treat them with auxin. 
E)  Put them in direct sunlight.

Question 17

Plants that flower in the United States only in the early spring (when nights are long) are __________plants.

Accepted Answer

A)  day-neutral 
B)  long-day 
C)  short-day 
D)  indeterminate-day 
E)  night-determinate 
A)  day-neutral 
B)  long-day 
C)  short-day 
D)  indeterminate-day 
E)  night-determinate

Question 18

Why can flowers be brought ʺinto bloomʺ out of season by changing the duration of light and darkness?

Accepted Answer

Plants measure the season by t

Question 19

Shoots grow up and roots grow down due to thigmotropism.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is TRUE of the relationship between the phytochrome system and the biological clock of plants?

Accepted Answer

A)  The biological clock detects light and sends the information to the phytochrome system. 
B)  The phytochrome system manufactures special cells that control the biological clock. 
C)  The phytochrome system detects light and resets the biological clock. 
D)  The phytochrome system serves as the biological clock for plants. 
E)  There is no relationship between the phytochrome system and the biological clock. 
A)  The biological clock detects light and sends the information to the phytochrome system. 
B)  The phytochrome system manufactures special cells that control the biological clock. 
C)  The phytochrome system detects light and resets the biological clock. 
D)  The phytochrome system serves as the biological clock for plants. 
E)  There is no relationship between the phytochrome system and the biological clock.

Exam 46: Plant Responses to the Environment

To encourage the formation of well-developed, heavily branched roots, you should treat cuttings with

Radish plants under insect attack

What caterpillar saliva-based chemical stimulates a corn plant to release an alarm signal?

A Native American tradition uses a ʺteaʺ made by soaking willow bark in water as a pain-reliever. Does it work? Why?

Which pigment is responsible for the phototropism responses of plants?

Ripening fruits are attached firmly to their trees, but once they are mature, the trees must release them. How does this happen?

The phytochrome that is active and absorbs far-red light is

In seeds from northern areas, what plant hormone often needs to be removed to get them to germinate, and how can it be removed?

Seed germination is stimulated by

Ethylene

Cutting a hedge with a trimmer stimulates it to become bushy because

A scientist who claims to have discovered a new plant hormone must demonstrate that this compound is

__________induces dormancy in seeds and buds and causes stomata to close.

Gravitropism is a plantʹs

Which of these hormones causes cell elongation, promotes apical dominance, and stimulates root branching?

Suppose you have some seeds that refuse to germinate when placed in moist soil. What could you do to encourage the seeds to germinate?

Plants that flower in the United States only in the early spring (when nights are long) are __________plants.

Why can flowers be brought ʺinto bloomʺ out of season by changing the duration of light and darkness?

Shoots grow up and roots grow down due to thigmotropism.

Which of the following is TRUE of the relationship between the phytochrome system and the biological clock of plants?

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

DNA: The Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

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