Question 1

Vibrations from an insect trapped inside a carnivorous sundew and thrashing around to escape stimulate the sundew's response. What happens next?

Accepted Answer

A)  The sundew's leaves snap shut and their spiked edges mesh, trapping the insect. 
B)  An electrical shock kills the insect. 
C)  Thigmotropism is activated, and it kills the insect. 
D)  The plant secretes a cocktail of digestive enzymes that rapidly breaks down the insect's body. 
A)  The sundew's leaves snap shut and their spiked edges mesh, trapping the insect. 
B)  An electrical shock kills the insect. 
C)  Thigmotropism is activated, and it kills the insect. 
D)  The plant secretes a cocktail of digestive enzymes that rapidly breaks down the insect's body.

Question 2

Leaves of the Venus flytrap and other sensitive plants move quickly due to

Accepted Answer

A)  reduced permeability to potassium ions. 
B)  muscle- like plant cells called myophytes. 
C)  an electrical stimulus and rapid diffusion of ions out of motor cells. 
D)  hormones that cause plant cell movement. 
A)  reduced permeability to potassium ions. 
B)  muscle- like plant cells called myophytes. 
C)  an electrical stimulus and rapid diffusion of ions out of motor cells. 
D)  hormones that cause plant cell movement.

Question 3

maintains seed dormancy, and ends seed dormancy by stimulating enzymes that break down the food reserves of the seed to fuel seedling growth.

Accepted Answer

A)  Abscisic acid; ethylene 
B)  Auxin; cytokinin 
C)  Cytokinin; auxin 
D)  Gibberellin; abscisic acid 
E)  Abscisic acid; gibberellin 
A)  Abscisic acid; ethylene 
B)  Auxin; cytokinin 
C)  Cytokinin; auxin 
D)  Gibberellin; abscisic acid 
E)  Abscisic acid; gibberellin

Question 4

Auxin

Accepted Answer

A)  promotes phototropism. 
B)  stimulates flowering. 
C)  promotes cell division. 
D)  causes the development of an abscission layer. 
E)  inhibits stem elongation. 
A)  promotes phototropism. 
B)  stimulates flowering. 
C)  promotes cell division. 
D)  causes the development of an abscission layer. 
E)  inhibits stem elongation.

Question 5

If a coleus plant becomes tall and spindly, what can you do to encourage it to develop lateral branches, so that it becomes bushier?

Accepted Answer

Cut or pinch off the topmost (

Question 6

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

Accepted Answer

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

Question 7

Seed germination is stimulated by

Accepted Answer

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

Exam 46: Plant Responses to the Environment

Vibrations from an insect trapped inside a carnivorous sundew and thrashing around to escape stimulate the sundew's response. What happens next?

Leaves of the Venus flytrap and other sensitive plants move quickly due to

maintains seed dormancy, and ends seed dormancy by stimulating enzymes that break down the food reserves of the seed to fuel seedling growth.

Auxin

If a coleus plant becomes tall and spindly, what can you do to encourage it to develop lateral branches, so that it becomes bushier?

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

Seed germination is stimulated by

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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