Question 1

Root formation in stem cuttings can be improved by the application of ____.

Accepted Answer

A)  synthetic auxins 
B)  abscisic acid 
C)  salicylic acid 
D)  ethylene 
E)  gibberellin 
A)  synthetic auxins 
B)  abscisic acid 
C)  salicylic acid 
D)  ethylene 
E)  gibberellin

Question 2

If a shoot's tip breaks off,____ levels rise and stimulates cell divisions in the lateral buds.

Accepted Answer

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

Question 3

Choose the one most appropriate answer for each. Each letter will be used once.
-statolith

Accepted Answer

A) growth response that orients parts of a plant in a direction influenced by light 
B) burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide 
C) an organism's response to changes in length of day relative to night 
D) organelle involved in sensing gravity 
E) light-sensitive pigment that helps set plant circadian rhythm based on length of night
F)flowering after a long season of cold temperatures
G)closes stomata in times of stress
H)initiates fruit ripening in nearby fruits
I)flowers only when hours of darkness fall below a critical value
J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
K)occurring on a 24-hour cycle
L)flowers only when hours of darkness are greater than some critical value
M)activates systemic acquired resistance
N)inhibits the growth of lateral roots
O)mobilizes food reserves in germinating seeds 
A) growth response that orients parts of a plant in a direction influenced by light 
B) burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide 
C) an organism's response to changes in length of day relative to night 
D) organelle involved in sensing gravity 
E) light-sensitive pigment that helps set plant circadian rhythm based on length of night
F)flowering after a long season of cold temperatures
G)closes stomata in times of stress
H)initiates fruit ripening in nearby fruits
I)flowers only when hours of darkness fall below a critical value
J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
K)occurring on a 24-hour cycle
L)flowers only when hours of darkness are greater than some critical value
M)activates systemic acquired resistance
N)inhibits the growth of lateral roots
O)mobilizes food reserves in germinating seeds

Question 4

Photoperiodism is the ____.

Accepted Answer

A)  duration of flowering in a plant 
B)  amount of light needed by a plant to exhibit normal growth 
C)  response of a plant to the duration of light and darkness 
D)  light phase of photosynthesis during which photolysis of water occurs 
E)  opposite of photorespiration 
A)  duration of flowering in a plant 
B)  amount of light needed by a plant to exhibit normal growth 
C)  response of a plant to the duration of light and darkness 
D)  light phase of photosynthesis during which photolysis of water occurs 
E)  opposite of photorespiration

Question 5

A plant hormone may have different effects on target cells due to any of the following except ____________.

Accepted Answer

A)  differences in location relative to the ground 
B)  the integration of several hormonal signals in the tissue 
C)  the action of a cell's hormone receptors upon binding to the hormone 
D)  different gene expression patterns triggered by the hormone 
E)  the concentration of the hormone in the tissue 
A)  differences in location relative to the ground 
B)  the integration of several hormonal signals in the tissue 
C)  the action of a cell's hormone receptors upon binding to the hormone 
D)  different gene expression patterns triggered by the hormone 
E)  the concentration of the hormone in the tissue

Question 6

Choose the one most appropriate answer for each. Each letter will be used once.
-gibberellin

Accepted Answer

A) growth response that orients parts of a plant in a direction influenced by light 
B) burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide 
C) an organism's response to changes in length of day relative to night 
D) organelle involved in sensing gravity 
E) light-sensitive pigment that helps set plant circadian rhythm based on length of night
F)flowering after a long season of cold temperatures
G)closes stomata in times of stress
H)initiates fruit ripening in nearby fruits
I)flowers only when hours of darkness fall below a critical value
J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
K)occurring on a 24-hour cycle
L)flowers only when hours of darkness are greater than some critical value
M)activates systemic acquired resistance
N)inhibits the growth of lateral roots
O)mobilizes food reserves in germinating seeds 
A) growth response that orients parts of a plant in a direction influenced by light 
B) burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide 
C) an organism's response to changes in length of day relative to night 
D) organelle involved in sensing gravity 
E) light-sensitive pigment that helps set plant circadian rhythm based on length of night
F)flowering after a long season of cold temperatures
G)closes stomata in times of stress
H)initiates fruit ripening in nearby fruits
I)flowers only when hours of darkness fall below a critical value
J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
K)occurring on a 24-hour cycle
L)flowers only when hours of darkness are greater than some critical value
M)activates systemic acquired resistance
N)inhibits the growth of lateral roots
O)mobilizes food reserves in germinating seeds

Question 7

Deciduous trees in North America are dormant during winter months because ____.

Accepted Answer

A)  they receive no precipitation during winter 
B)  photosynthesis cannot occur during winter 
C)  this offers a way to survive the extended drought-like conditions 
D)  the cold temperatures would otherwise damage leaves and buds 
E)  they have no leaves during winter months 
A)  they receive no precipitation during winter 
B)  photosynthesis cannot occur during winter 
C)  this offers a way to survive the extended drought-like conditions 
D)  the cold temperatures would otherwise damage leaves and buds 
E)  they have no leaves during winter months

Question 8

A directional adjustment of growth in response to environmental stimuli is called ____.

Accepted Answer

A)  circadian rhythm 
B)  vernalization 
C)  photoperiodism 
D)  statolith 
E)  tropism 
A)  circadian rhythm 
B)  vernalization 
C)  photoperiodism 
D)  statolith 
E)  tropism

Question 9

Gibberellin stimulates ____.

Accepted Answer

A)  fruit ripening 
B)  leaf abscission 
C)  lateral root formation 
D)  stem lengthening between the nodes 
E)  stem lengthening at the tip 
A)  fruit ripening 
B)  leaf abscission 
C)  lateral root formation 
D)  stem lengthening between the nodes 
E)  stem lengthening at the tip

Question 10

The flowers of plants pollinated by night-flying bats open,secrete nectar,and release fragrance only at night.The mechanism that controls this is called ____.

Accepted Answer

A)  thigmotropism 
B)  heliotropism 
C)  phototropism 
D)  photoperiodism 
E)  circadian rhythm 
A)  thigmotropism 
B)  heliotropism 
C)  phototropism 
D)  photoperiodism 
E)  circadian rhythm

Question 11

Choose the one most appropriate answer for each. Each letter will be used once.
-hypersensitive response

Accepted Answer

A) growth response that orients parts of a plant in a direction influenced by light 
B) burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide 
C) an organism's response to changes in length of day relative to night 
D) organelle involved in sensing gravity 
E) light-sensitive pigment that helps set plant circadian rhythm based on length of night
F)flowering after a long season of cold temperatures
G)closes stomata in times of stress
H)initiates fruit ripening in nearby fruits
I)flowers only when hours of darkness fall below a critical value
J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
K)occurring on a 24-hour cycle
L)flowers only when hours of darkness are greater than some critical value
M)activates systemic acquired resistance
N)inhibits the growth of lateral roots
O)mobilizes food reserves in germinating seeds 
A) growth response that orients parts of a plant in a direction influenced by light 
B) burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide 
C) an organism's response to changes in length of day relative to night 
D) organelle involved in sensing gravity 
E) light-sensitive pigment that helps set plant circadian rhythm based on length of night
F)flowering after a long season of cold temperatures
G)closes stomata in times of stress
H)initiates fruit ripening in nearby fruits
I)flowers only when hours of darkness fall below a critical value
J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
K)occurring on a 24-hour cycle
L)flowers only when hours of darkness are greater than some critical value
M)activates systemic acquired resistance
N)inhibits the growth of lateral roots
O)mobilizes food reserves in germinating seeds

Question 12

Gravity-sensing mechanisms of many organisms are based on ____.

Accepted Answer

A)  spicules 
B)  statoliths 
C)  uric acid crystals 
D)  sclereids 
E)  nematocysts 
A)  spicules 
B)  statoliths 
C)  uric acid crystals 
D)  sclereids 
E)  nematocysts

Question 13

Respond to the following statements in reference to the five plant hormones listed below.
-This hormone opposes the effects of auxin.

Accepted Answer

A) auxins 
B) gibberellins 
C) cytokinins 
D) abscisic acid 
E) Ethylene 
A) auxins 
B) gibberellins 
C) cytokinins 
D) abscisic acid 
E) Ethylene

Question 14

Figure 30.9A
  
-The effect of directional growth shown in the accompanying figure is known to be caused by ____.

Accepted Answer

A)  thigmotropism 
B)  gravitropism 
C)  abscisic acid 
D)  salicylic acid 
E)  vernalization 
A)  thigmotropism 
B)  gravitropism 
C)  abscisic acid 
D)  salicylic acid 
E)  vernalization

Question 15

Choose the one most appropriate answer for each. Each letter will be used once.
-circadian rhythm

Accepted Answer

A) growth response that orients parts of a plant in a direction influenced by light 
B) burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide 
C) an organism's response to changes in length of day relative to night 
D) organelle involved in sensing gravity 
E) light-sensitive pigment that helps set plant circadian rhythm based on length of night
F)flowering after a long season of cold temperatures
G)closes stomata in times of stress
H)initiates fruit ripening in nearby fruits
I)flowers only when hours of darkness fall below a critical value
J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
K)occurring on a 24-hour cycle
L)flowers only when hours of darkness are greater than some critical value
M)activates systemic acquired resistance
N)inhibits the growth of lateral roots
O)mobilizes food reserves in germinating seeds 
A) growth response that orients parts of a plant in a direction influenced by light 
B) burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide 
C) an organism's response to changes in length of day relative to night 
D) organelle involved in sensing gravity 
E) light-sensitive pigment that helps set plant circadian rhythm based on length of night
F)flowering after a long season of cold temperatures
G)closes stomata in times of stress
H)initiates fruit ripening in nearby fruits
I)flowers only when hours of darkness fall below a critical value
J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
K)occurring on a 24-hour cycle
L)flowers only when hours of darkness are greater than some critical value
M)activates systemic acquired resistance
N)inhibits the growth of lateral roots
O)mobilizes food reserves in germinating seeds

Question 16

Irises and other ____ plants flower only when the hours of darkness fall below a critical value,typically in summer.

Accepted Answer

A)  short-day 
B)  long-day 
C)  annual 
D)  biennial 
E)  perennial 
A)  short-day 
B)  long-day 
C)  annual 
D)  biennial 
E)  perennial

Question 17

Respond to the following statements in reference to the five plant hormones listed below.
-This hormone promotes bud and seed dormancy.

Accepted Answer

A) auxins 
B) gibberellins 
C) cytokinins 
D) abscisic acid 
E) Ethylene 
A) auxins 
B) gibberellins 
C) cytokinins 
D) abscisic acid 
E) Ethylene

Question 18

In most cases,the term auxin refers to ____.

Accepted Answer

A)  abscisic acid 
B)  indole-3-acetic acid 
C)  jasmonic acid 
D)  nitric oxide 
E)  salicylic acid 
A)  abscisic acid 
B)  indole-3-acetic acid 
C)  jasmonic acid 
D)  nitric oxide 
E)  salicylic acid

Question 19

Apical dominance is a result of the ________transport of auxin,which is produced mainly in shoot apical meristems.

Accepted Answer

The answer of Apical dominance is a result of the...

Question 20

A houseplant placed in a window grows toward the source of light because auxin ____.

Accepted Answer

A)  becomes more concentrated on the illuminated side of the plant 
B)  becomes more concentrated in the roots of the plant 
C)  becomes more concentrated on the shady side of the plant 
D)  inhibits the growth of cells on the shady side, so the cells on the sunny side grow larger 
E)  inhibits the growth of cells on the shady side, so the cells on the sunny side grow faster 
A)  becomes more concentrated on the illuminated side of the plant 
B)  becomes more concentrated in the roots of the plant 
C)  becomes more concentrated on the shady side of the plant 
D)  inhibits the growth of cells on the shady side, so the cells on the sunny side grow larger 
E)  inhibits the growth of cells on the shady side, so the cells on the sunny side grow faster

Exam 30: Communication Strategies in Plants

Root formation in stem cuttings can be improved by the application of ____.

If a shoot's tip breaks off,____ levels rise and stimulates cell divisions in the lateral buds.

Choose the one most appropriate answer for each. Each letter will be used once. -statolith

Photoperiodism is the ____.

A plant hormone may have different effects on target cells due to any of the following except ____________.

Choose the one most appropriate answer for each. Each letter will be used once. -gibberellin

Deciduous trees in North America are dormant during winter months because ____.

A directional adjustment of growth in response to environmental stimuli is called ____.

Gibberellin stimulates ____.

The flowers of plants pollinated by night-flying bats open,secrete nectar,and release fragrance only at night.The mechanism that controls this is called ____.

Choose the one most appropriate answer for each. Each letter will be used once. -hypersensitive response

Gravity-sensing mechanisms of many organisms are based on ____.

Respond to the following statements in reference to the five plant hormones listed below. -This hormone opposes the effects of auxin.

Figure 30.9A -The effect of directional growth shown in the accompanying figure is known to be caused by ____.

Choose the one most appropriate answer for each. Each letter will be used once. -circadian rhythm

Irises and other ____ plants flower only when the hours of darkness fall below a critical value,typically in summer.

Respond to the following statements in reference to the five plant hormones listed below. -This hormone promotes bud and seed dormancy.

In most cases,the term auxin refers to ____.

Apical dominance is a result of the ________transport of auxin,which is produced mainly in shoot apical meristems.

A houseplant placed in a window grows toward the source of light because auxin ____.

Invitation to Biology

Life's Chemical Bases

Molecules of Life

Cell Structure

Ground Rules of Metabolism

Where it Starts—Photosynthesis

How Cells Release Chemical Energy

DNA Structure and Function

From DNA to Protein

Control of Gene Expression

How Cells Reproduce

Meiosis and Sexual Reproduction

Observing Patterns in Inherited Traits

Chromosomes and Human Inheritance

Studying and Manipulating Genomes

Evidence of Evolution

Processes of Evolution

Organizing Information about Species

Life's Origin and Early Evolution

Viruses, Bacteria, and Archaea

Protists: The Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolution: The Invertebrates

Animal Evolution: The Chordates

Human Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Animal Tissues and Organ Systems

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive System

Animal Development

Animal Behavior

Population Ecology

Community Ecology

Ecosystems

The Biosphere

Human Impacts on the Biosphere

Filters