Question 1

What causes the "leaf drop" that occurs in woody plants in preparation for winter dormancy?

Accepted Answer

A) suppressed auxin production 
B) increased chlorophyll development 
C) inhibition of gibberellin 
D) increased ethylene production 
E) opened stomata 
A) suppressed auxin production 
B) increased chlorophyll development 
C) inhibition of gibberellin 
D) increased ethylene production 
E) opened stomata

Question 2

An old gardening folk tradition uses a "tea" made by soaking the stem tips of willows in water overnight and then using the tea to water cuttings. This is supposed to encourage root formation. Does it work? Why?

Accepted Answer

Yes, it works. The stem tips c

Question 3

If you want to keep cut flowers fresh, treat them with:

Accepted Answer

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

Question 4

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

Accepted Answer

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

Question 5

People should not "torment" their Venus flytrap plant with toothpicks or other indigestible objects (to show off its ability to close its trap)because the plant uses up much of its supply of ________ every time the trap closes.

Accepted Answer

The answer of People should not "torment" their Venus flytrap...

Question 6

A plant's tendency to grow toward a source of light is called:

Accepted Answer

A) phototropism. 
B) lumitropism. 
C) gravitropism. 
D) amylotropism. 
E) thigmotropism. 
A) phototropism. 
B) lumitropism. 
C) gravitropism. 
D) amylotropism. 
E) thigmotropism.

Question 7

A group of plant geneticists discovers a mutant plant that has a deficiency in gibberellin production. All other hormones, including auxins, cytokinins, florigens, ethylene, and abscisic acid, are produced in normal quantities and are not directly affected by this mutation. Based on this scenario, the mutant plant most likely exhibits:

Accepted Answer

A) a lack of phototropism in the shoots. 
B) a lack of gravitropism in the roots. 
C) delayed senescence. 
D) a dwarf growth pattern (very short stem). 
E) stomata that don't close. 
A) a lack of phototropism in the shoots. 
B) a lack of gravitropism in the roots. 
C) delayed senescence. 
D) a dwarf growth pattern (very short stem). 
E) stomata that don't close.

Question 8

What kinds of hormonal changes occur as trees prepare for winter dormancy?

Accepted Answer

Cytokinin and auxin levels dec

Question 9

________ induces dormancy in seeds and buds and causes stomata to close?

Accepted Answer

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

Question 10

Shoots grow up and roots grow down due to thigmotropism. True or False?

Accepted Answer

A) True 
 B)False

Question 11

Willow trees and many other plants produce ________, from which aspirin is made.

Accepted Answer

A) nicotine 
B) acetaminophen 
C) acetic acid 
D) salicylic acid 
E) volantin 
A) nicotine 
B) acetaminophen 
C) acetic acid 
D) salicylic acid 
E) volantin

Question 12

At night, when little red light is available to the plants in an area:

Accepted Answer

A) Pr and Pfr are both destroyed. 
B) Pr and Pfr are both formed from inactive phytochrome. 
C) Pr is converted to Pfr. 
D) Pfr is converted to Pr. 
E) Pr stimulates flowering. 
A) Pr and Pfr are both destroyed. 
B) Pr and Pfr are both formed from inactive phytochrome. 
C) Pr is converted to Pfr. 
D) Pfr is converted to Pr. 
E) Pr stimulates flowering.

Question 13

Seed germination is stimulated by:

Accepted Answer

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

Question 14

Some plants under attack by insects can communicate this information to other parts of the same plant and to nearby plants via:

Accepted Answer

A) vibrations in their roots. 
B) the release of chemicals into their roots. 
C) the release of chemicals into the air. 
D) low-frequency sound waves. 
A) vibrations in their roots. 
B) the release of chemicals into their roots. 
C) the release of chemicals into the air. 
D) low-frequency sound waves.

Question 15

How do auxin and cytokinin interact to affect the shape and growth of a plant?

Accepted Answer

Auxin encourages the development of the

Question 16

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

Accepted Answer

A) florigen 
B) methyl salicylate 
C) salicylic acid 
D) volicitin 
E) salicin 
A) florigen 
B) methyl salicylate 
C) salicylic acid 
D) volicitin 
E) salicin

Question 17

Cytokinins cause most of their responses in plants by stimulating cell ________.

Accepted Answer

The answer of Cytokinins cause most of their responses in...

Question 18

In the late winter, as seeds prepare to germinate, the levels of ________ in seeds should be declining as the levels of ________ are increasing.

Accepted Answer

abscisic a

Question 19

The two hormones involved in seed germination and seed dormancy are:

Accepted Answer

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

Question 20

What mechanisms do plants use to discourage predation?

Accepted Answer

Some plants produce toxic chem

Exam 45: Plant Responses to the Environment

What causes the "leaf drop" that occurs in woody plants in preparation for winter dormancy?

An old gardening folk tradition uses a "tea" made by soaking the stem tips of willows in water overnight and then using the tea to water cuttings. This is supposed to encourage root formation. Does it work? Why?

If you want to keep cut flowers fresh, treat them with:

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

People should not "torment" their Venus flytrap plant with toothpicks or other indigestible objects (to show off its ability to close its trap)because the plant uses up much of its supply of ________ every time the trap closes.

A plant's tendency to grow toward a source of light is called:

What kinds of hormonal changes occur as trees prepare for winter dormancy?

________ induces dormancy in seeds and buds and causes stomata to close?

Shoots grow up and roots grow down due to thigmotropism. True or False?

Willow trees and many other plants produce ________, from which aspirin is made.

At night, when little red light is available to the plants in an area:

Seed germination is stimulated by:

Some plants under attack by insects can communicate this information to other parts of the same plant and to nearby plants via:

How do auxin and cytokinin interact to affect the shape and growth of a plant?

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

Cytokinins cause most of their responses in plants by stimulating cell ________.

In the late winter, as seeds prepare to germinate, the levels of ________ in seeds should be declining as the levels of ________ are increasing.

The two hormones involved in seed germination and seed dormancy are:

What mechanisms do plants use to discourage predation?

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

The Continuity of Life: Cellular 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 Amidst 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

How Do Ecosystems Work

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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In the late winter, as seeds prepare to germinate, the levels of in seeds should be declining as the levels of are increasing.