Question 1

Which adaptation is least likely to be used by xerophytes as a means of dealing with dry conditions?

Accepted Answer

A)  Thick cuticles 
B)  Stomata in crypts 
C)  Succulence 
D)  Trichomes that diffract light 
E)  Abundant leaves 
A)  Thick cuticles 
B)  Stomata in crypts 
C)  Succulence 
D)  Trichomes that diffract light 
E)  Abundant leaves

Question 2

Plants acquire systemic resistance in much the same way that people acquire resistance to pathogens; however, the mechanism of systemic acquired resistance is quite different in plants.Which of the following does not have a role in acquired resistance in plants?

Accepted Answer

A)  Salicylic acid 
B)  R genes 
C)  Methyl salicylate 
D)  PR proteins 
E)  All of the above have a role in acquired resistance in plants. 
A)  Salicylic acid 
B)  R genes 
C)  Methyl salicylate 
D)  PR proteins 
E)  All of the above have a role in acquired resistance in plants.

Question 3

Plants limit the spread of viral pathogens by blocking their _______ with polysaccharides or extensin.

Accepted Answer

The answer of Plants limit the spread of viral pathogens...

Question 4

R and Avr genes are involved a kind of plant defense called

Accepted Answer

A)  nonspecific immunity. 
B)  gene-for-gene resistance. 
C)  PR response. 
D)  constitutive resistance. 
E)  herbivory. 
A)  nonspecific immunity. 
B)  gene-for-gene resistance. 
C)  PR response. 
D)  constitutive resistance. 
E)  herbivory.

Question 5

Which adaptation would not be useful for a plant growing with its roots submerged in salt water?

Accepted Answer

A)  Salt glands 
B)  The ability to develop large negative water potential within root cells 
C)  Reduced activity of transporters that move NaCl into the vacuole 
D)  Accumulation of salt in the central vacuole 
E)  Thickened cuticles 
A)  Salt glands 
B)  The ability to develop large negative water potential within root cells 
C)  Reduced activity of transporters that move NaCl into the vacuole 
D)  Accumulation of salt in the central vacuole 
E)  Thickened cuticles

Question 6

Which statement about abscisic acid is false?

Accepted Answer

A)  It is produced by leaves that experience water stress. 
B)  It causes stomata to close. 
C)  It induces the synthesis of LEA proteins in leaves. 
D)  It is synthesized in roots. 
E)  It travels to the leaves through the xylem. 
A)  It is produced by leaves that experience water stress. 
B)  It causes stomata to close. 
C)  It induces the synthesis of LEA proteins in leaves. 
D)  It is synthesized in roots. 
E)  It travels to the leaves through the xylem.

Exam 38: Plant Responses to Environmental Challenges

Which adaptation is least likely to be used by xerophytes as a means of dealing with dry conditions?

Plants acquire systemic resistance in much the same way that people acquire resistance to pathogens; however, the mechanism of systemic acquired resistance is quite different in plants.Which of the following does not have a role in acquired resistance in plants?

Plants limit the spread of viral pathogens by blocking their _______ with polysaccharides or extensin.

R and Avr genes are involved a kind of plant defense called

Which adaptation would not be useful for a plant growing with its roots submerged in salt water?

Which statement about abscisic acid is false?

Studying Life

Small Molecules and the Chemistry of Life

Proteins, Carbohydrates, and Lipids

Nucleic Acids and the Origin of Life

Cells: the Working Units of Life

Cell Membranes

Cell Communication and Multicellularity

Energy, Enzymes, and Metabolism

Pathways That Harvest Chemical Energy

Photosynthesis: Energy From Sunlight

The Cell Cycle and Cell Division

Inheritance, Genes, and Chromosomes

Dna and Its Role in Heredity

From Dna to Protein: Gene Expression

Gene Mutation and Molecular Medicine

Regulation of Gene Expression

Genomes

Recombinant Dna and Biotechnology

Mechanisms of Evolution

Reconstructing and Using Phylogenies

Speciation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria, Archaea, and Viruses

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

The Evolution and Diversity of Fungi

Animal Origins and the Evolution of Body Plans

Protostome Animals

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The Plant Body

Transport in Plants

Plant Nutrition

Regulation of Plant Growth

Reproduction in Flowering Plants

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons, Glia, and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Functions

Musculoskeletal Systems

Gas Exchange

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Salt and Water Balance and Nitrogen Excretion

Animal Behavior

The Physical Environment and Biogeography of Life

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