Question 1

Why does removing an overripe, mushy apple from a container of otherwise good apples help preserve the good apples?

Accepted Answer

A)  Chemicals in the overripe apple stimulate the conversion of sugar to starch in the good apples. 
B)  Gibberellins help preserve the good apples. 
C)  Ethylene production in the good apples is inhibited by the lack of ethylene production in the overripe apple. 
D)  The production of cytokinins is inhibited in the remaining good apples. 
E)  The overripe apple makes ethylene gas, which can cause the good apples to ripen more quickly than usual. 
A)  Chemicals in the overripe apple stimulate the conversion of sugar to starch in the good apples. 
B)  Gibberellins help preserve the good apples. 
C)  Ethylene production in the good apples is inhibited by the lack of ethylene production in the overripe apple. 
D)  The production of cytokinins is inhibited in the remaining good apples. 
E)  The overripe apple makes ethylene gas, which can cause the good apples to ripen more quickly than usual.

Question 2

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 3

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 4

Based on the figure, which of the following plants will NOT flower under long- day or interrupted- night conditions?

Accepted Answer

A)  Iris 
B)  Rose 
C)  Chrysanthemum 
A)  Iris 
B)  Rose 
C)  Chrysanthemum

Question 5

Plants that flower in the United States in July (when nights are short) 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 6

Most scientists believe that the lateral buds farthest from the top of a tree are the least inhibited from sprouting because they

Accepted Answer

A)  receive the most cytokinins from the roots. 
B)  produce gibberellins. 
C)  receive the least light. 
D)  are the most affected by gravity. 
E)  are shaded by the top of the tree. 
A)  receive the most cytokinins from the roots. 
B)  produce gibberellins. 
C)  receive the least light. 
D)  are the most affected by gravity. 
E)  are shaded by the top of the tree.

Question 7

A group of plant geneticists discovers a mutant plant that has a deficiency in gibberellin production. All other ho including auxins, cytokinins, florigens, ethylene, and abscisic acid, are produced in normal quantities and are no affected by this mutation. Based on this scenario, the mutant plant most likely exhibits

Accepted Answer

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

Question 8

Tomatoes that are planted upside down still grow upright, displaying

Accepted Answer

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

Question 9

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

Question 10

When auxin accumulates on the lower side of the root of a germinating seed, it

Accepted Answer

A)  increases cell elongation on the lower side of the root 
B)  decreases the use of energy by the cells in the root. 
C)  has no effect on the root; it affects only the developing shoot. 
D)  increases the use of energy by the cells in the root. 
E)  decreases cell elongation on the lower side of the root. 
A)  increases cell elongation on the lower side of the root 
B)  decreases the use of energy by the cells in the root. 
C)  has no effect on the root; it affects only the developing shoot. 
D)  increases the use of energy by the cells in the root. 
E)  decreases cell elongation on the lower side of the root.

Question 11

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

Accepted Answer

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

Question 12

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

Accepted Answer

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

Question 13

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

Accepted Answer

Auxin encourages the development of the

Question 14

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 15

The process of aging is called

Accepted Answer

A)  senescence. 
B)  abscission. 
C)  elongation. 
D)  maturation. 
E)  death. 
A)  senescence. 
B)  abscission. 
C)  elongation. 
D)  maturation. 
E)  death.

Question 16

The hormone was named after the fungus that causes "foolish seedling" disease in rice.

Accepted Answer

A)  cytokinin 
B)  gibberellin 
C)  ethylene 
D)  auxin 
E)  florigen 
A)  cytokinin 
B)  gibberellin 
C)  ethylene 
D)  auxin 
E)  florigen

Question 17

Senescence in plants usually involves

Accepted Answer

A)  apical dominance. 
B)  the presence of cytokinins. 
C)  the development of photosynthetic enzymes. 
D)  the formation of an abscission layer. 
E)  shade from other plants. 
A)  apical dominance. 
B)  the presence of cytokinins. 
C)  the development of photosynthetic enzymes. 
D)  the formation of an abscission layer. 
E)  shade from other plants.

Question 18

If a plant is living under conditions that limit root growth, shoot growth is

Accepted Answer

A)  limited as well, due to less cytokinin being produced by the root. 
B)  unaffected by the amount of root growth. 
C)  stimulated, due to less cytokinin being produced by the root. 
D)  stimulated, due to more auxin being produced by the apical meristem. 
E)  limited as well, due to more auxin being produced by the apical meristem. 
A)  limited as well, due to less cytokinin being produced by the root. 
B)  unaffected by the amount of root growth. 
C)  stimulated, due to less cytokinin being produced by the root. 
D)  stimulated, due to more auxin being produced by the apical meristem. 
E)  limited as well, due to more auxin being produced by the apical meristem.

Question 19

In 2007, research confirmed the existence of hormones that control the timing of flowering. These hormones are called

Accepted Answer

A)  auxins. 
B)  florigens. 
C)  abscisic acids. 
D)  ethylenes. 
E)  cytokinins. 
A)  auxins. 
B)  florigens. 
C)  abscisic acids. 
D)  ethylenes. 
E)  cytokinins.

Question 20

Auxins are used in rooting powders to encourage the formation of well- branched roots.

Accepted Answer

A) True 
 B)False

Exam 46: Plant Responses to the Environment

Why does removing an overripe, mushy apple from a container of otherwise good apples help preserve the good apples?

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

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

Based on the figure, which of the following plants will NOT flower under long- day or interrupted- night conditions?

Plants that flower in the United States in July (when nights are short) are plants.

Most scientists believe that the lateral buds farthest from the top of a tree are the least inhibited from sprouting because they

Tomatoes that are planted upside down still grow upright, displaying

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

When auxin accumulates on the lower side of the root of a germinating seed, it

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

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

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

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

The process of aging is called

The hormone was named after the fungus that causes "foolish seedling" disease in rice.

Senescence in plants usually involves

If a plant is living under conditions that limit root growth, shoot growth is

In 2007, research confirmed the existence of hormones that control the timing of flowering. These hormones are called

Auxins are used in rooting powders to encourage the formation of well- branched roots.

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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