Question 1

Use the following to answer questions :
Refer to the diagram below, showing seed germination.  
-What process is taking place in seed 1?

Accepted Answer

Imbibition

Question 2

The first evidence that gibberellins are produced by plants was gathered in studies with dwarf mutant strains of corn. Treatment with gibberellins caused the dwarf plants to _______, while the normal, tall plants _______.

Accepted Answer

A)  grow taller; also grew taller, but only slightly 
B)  grow taller; were virtually unaffected 
C)  stop growing immediately; stopped growing after a period of time 
D)  stop growing; were virtually unaffected 
E)  die; stopped growing 
A)  grow taller; also grew taller, but only slightly 
B)  grow taller; were virtually unaffected 
C)  stop growing immediately; stopped growing after a period of time 
D)  stop growing; were virtually unaffected 
E)  die; stopped growing B

Question 3

Which of the following is not an advantage of seed dormancy?

Accepted Answer

A)  It makes the seed more likely to be digested by birds that disperse it. 
B)  It counters the effects of year-to-year variations in the environment. 
C)  It increases the likelihood that a seed will germinate in the right place. 
D)  It favors dispersal of the seed. 
E)  It may result in germination at a favorable time of year. 
A)  It makes the seed more likely to be digested by birds that disperse it. 
B)  It counters the effects of year-to-year variations in the environment. 
C)  It increases the likelihood that a seed will germinate in the right place. 
D)  It favors dispersal of the seed. 
E)  It may result in germination at a favorable time of year. A

Question 4

The discovery of auxin can be traced back to the work of Charles and Francis Darwin and their studies of

Accepted Answer

A)  photosynthesis. 
B)  photorespiration. 
C)  photophosphorylation. 
D)  phototropism. 
E)  photoperiodism. 
A)  photosynthesis. 
B)  photorespiration. 
C)  photophosphorylation. 
D)  phototropism. 
E)  photoperiodism.

Question 5

The first (or embryonic) root that emerges from the seed is called the

Accepted Answer

A)  hypocotyl. 
B)  epicotyl. 
C)  coleoptile. 
D)  cotyledon. 
E)  radicle. 
A)  hypocotyl. 
B)  epicotyl. 
C)  coleoptile. 
D)  cotyledon. 
E)  radicle.

Question 6

In addition to hormones, _______ regulate the growth of plants.

Accepted Answer

A)  photoreceptors 
B)  lipids 
C)  starches 
D)  mutations 
E)  germination inhibitors 
A)  photoreceptors 
B)  lipids 
C)  starches 
D)  mutations 
E)  germination inhibitors

Question 7

The prephotosynthetic seedling must survive using resources from the _______ or the _______.

Accepted Answer

A)  cotyledons; endosperm 
B)  radicle; hypocotyl 
C)  foliage leaf; epicotyl 
D)  seed coat; coleoptile 
E)  apical hook; secondary roots 
A)  cotyledons; endosperm 
B)  radicle; hypocotyl 
C)  foliage leaf; epicotyl 
D)  seed coat; coleoptile 
E)  apical hook; secondary roots

Question 8

Which of the following plant hormones is structurally related to a base common in nucleic acids?

Accepted Answer

A)  Abscisic acid 
B)  Gibberellins 
C)  Auxin 
D)  Zeatin 
E)  Ethylene 
A)  Abscisic acid 
B)  Gibberellins 
C)  Auxin 
D)  Zeatin 
E)  Ethylene

Question 9

Which of the following does not serve to break dormancy and initiate seed germination?

Accepted Answer

A)  Scarification by abrasion 
B)  Scarification by fire 
C)  Exposure to water 
D)  Abscisic acid 
E)  Growth promoters 
A)  Scarification by abrasion 
B)  Scarification by fire 
C)  Exposure to water 
D)  Abscisic acid 
E)  Growth promoters

Question 10

Florists use silver thiosulfate to

Accepted Answer

A)  delay abscission of petals caused by the action of ethylene. 
B)  delay abscission of leaves caused by the action of abscisic acid. 
C)  keep petals from turning brown because of the action of ethylene. 
D)  keep leaves green longer. 
E)  promote flower fertilization. 
A)  delay abscission of petals caused by the action of ethylene. 
B)  delay abscission of leaves caused by the action of abscisic acid. 
C)  keep petals from turning brown because of the action of ethylene. 
D)  keep leaves green longer. 
E)  promote flower fertilization.

Question 11

Which of the following is not involved in the polar transport of auxin?

Accepted Answer

A)  Diffusion across a plasma membrane 
B)  Membrane protein asymmetry of auxin transport carriers 
C)  Proton pumping from the cytosol 
D)  Ionization of auxin as a weak acid 
E)  All of the above are involved. 
A)  Diffusion across a plasma membrane 
B)  Membrane protein asymmetry of auxin transport carriers 
C)  Proton pumping from the cytosol 
D)  Ionization of auxin as a weak acid 
E)  All of the above are involved.

Question 12

Gibberellins do not have a major effect on

Accepted Answer

A)  shoot growth. 
B)  fruit development. 
C)  seed germination. 
D)  root growth. 
E)  breaking winter dormancy. 
A)  shoot growth. 
B)  fruit development. 
C)  seed germination. 
D)  root growth. 
E)  breaking winter dormancy.

Question 13

The ethylene signal transduction pathway uses two membrane _______ to allow the plant to respond to this hormone.

Accepted Answer

The answer of The ethylene signal transduction pathway uses two...

Question 14

Why are some fruits packaged in bags made of a plastic that is permeable to gasses?

Accepted Answer

A)  To speed the ripening of the fruit 
B)  To allow auxin to escape 
C)  To allow ethylene to escape 
D)  To allow oxygen to enter the bag 
E)  To allow carbon dioxide to escape 
A)  To speed the ripening of the fruit 
B)  To allow auxin to escape 
C)  To allow ethylene to escape 
D)  To allow oxygen to enter the bag 
E)  To allow carbon dioxide to escape

Question 15

Plant growth substances (hormones) generally

Accepted Answer

A)  have a single specific role. 
B)  affect mainly the cells that produce them. 
C)  are species-specific. 
D)  are produced in many different parts of the plant. 
E)  elicit rapid responses. 
A)  have a single specific role. 
B)  affect mainly the cells that produce them. 
C)  are species-specific. 
D)  are produced in many different parts of the plant. 
E)  elicit rapid responses.

Question 16

Ethylene

Accepted Answer

A)  causes the triple response in seedlings growing underground. 
B)  is liquid at room temperature. 
C)  delays the ripening of fruits. 
D)  generally promotes stem elongation. 
E)  inhibits the swelling of stems, in opposition to cytokinin's effects. 
A)  causes the triple response in seedlings growing underground. 
B)  is liquid at room temperature. 
C)  delays the ripening of fruits. 
D)  generally promotes stem elongation. 
E)  inhibits the swelling of stems, in opposition to cytokinin's effects.

Question 17

The phenomenon of apical dominance is strengthened most by

Accepted Answer

A)  removal of the tip. 
B)  auxin production. 
C)  removal of leaves. 
D)  production of fruits. 
E)  removal of fruits. 
A)  removal of the tip. 
B)  auxin production. 
C)  removal of leaves. 
D)  production of fruits. 
E)  removal of fruits.

Question 18

The transport of auxin is

Accepted Answer

A)  multidirectional in shoots. 
B)  a completely passive process. 
C)  polar from base to apex in coleoptiles. 
D)  polar from apex to stem in coleoptiles. 
E)  not dependent on membrane transporters. 
A)  multidirectional in shoots. 
B)  a completely passive process. 
C)  polar from base to apex in coleoptiles. 
D)  polar from apex to stem in coleoptiles. 
E)  not dependent on membrane transporters.

Question 19

A plant grows toward the light when the auxin moves to the side (toward/away from) _______ the light; this has the effect of _______ the cell walls in that region, causing asymmetric growth, and thus, bending.

Accepted Answer

away from;

Question 20

The physiologically active form of phytochrome is

Accepted Answer

A)  Pfr. 
B)  Pr. 
C)  G protein. 
D)  cryptochrome A. 
E)  730 nm. 
A)  Pfr. 
B)  Pr. 
C)  G protein. 
D)  cryptochrome A. 
E)  730 nm.

Exam 37: Regulation of Plant Growth

Use the following to answer questions : Refer to the diagram below, showing seed germination. -What process is taking place in seed 1?

The first evidence that gibberellins are produced by plants was gathered in studies with dwarf mutant strains of corn. Treatment with gibberellins caused the dwarf plants to _______, while the normal, tall plants _______.

Which of the following is not an advantage of seed dormancy?

The discovery of auxin can be traced back to the work of Charles and Francis Darwin and their studies of

The first (or embryonic) root that emerges from the seed is called the

In addition to hormones, _______ regulate the growth of plants.

The prephotosynthetic seedling must survive using resources from the _______ or the _______.

Which of the following plant hormones is structurally related to a base common in nucleic acids?

Which of the following does not serve to break dormancy and initiate seed germination?

Florists use silver thiosulfate to

Which of the following is not involved in the polar transport of auxin?

Gibberellins do not have a major effect on

The ethylene signal transduction pathway uses two membrane _______ to allow the plant to respond to this hormone.

Why are some fruits packaged in bags made of a plastic that is permeable to gasses?

Plant growth substances (hormones) generally

Ethylene

The phenomenon of apical dominance is strengthened most by

The transport of auxin is

A plant grows toward the light when the auxin moves to the side (toward/away from) _______ the light; this has the effect of _______ the cell walls in that region, causing asymmetric growth, and thus, bending.

The physiologically active form of phytochrome is

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 Signaling and Communication

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

Recombinent Dna and Biotechnology

Differential Gene Expression in Development

Development and Evolutionary Change

Evidence and Mechanisms of Evolution

Reconstructing and Using Phylogenies

Species and Their Formation

Evolution of Genes and Genomes

The History of Life on Earth

Bacteria and Archaea: the Prokaryotic Domains

The Origin and Diversification of Eukaryotes

Plants Without Seeds: From Water to Land

The Evolution of Seed Plants

Fungi: Recyclers, Pathogens, Parasites, and Plant Partners

Animal Origins and the Evolution of Body Plans

Protostome Animals

Deuterostome Animals

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction in Flowering Plants

Plant Responses to Environmental Challenges

Physiology, Homeostasis, and Temperature Regulation

Animal Hormones

Immunology: Animal Defense Systems

Animal Reproduction

Animal Development

Neurons and Nervous Systems

Sensory Systems

The Mammalian Nervous System: Structure and Higher Function

Musculoskeletal Systems

Gas Exchange in Animals

Circulatory Systems

Nutrition, Digestion, and Absorption

Salt and Water Balance and Nitrogen

Animal Behavior

Ecology and the Distribution of Life

Population Ecology

Species Interaction and Coevolution

Community Ecology

Ecosystems and Global Ecology

Conservation Biology

Filters

The first evidence that gibberellins are produced by plants was gathered in studies with dwarf mutant strains of corn. Treatment with gibberellins caused the dwarf plants to _, while the normal, tall plants _.

The prephotosynthetic seedling must survive using resources from the _ or the _.

A plant grows toward the light when the auxin moves to the side (toward/away from) _ the light; this has the effect of _ the cell walls in that region, causing asymmetric growth, and thus, bending.