Question 1

Synthetic auxin can be used as a(n) ____.

Accepted Answer

A)  ​pesticide 
B)  ​herbicide 
C)  ​fungicide 
D)  ​insecticide 
E)  ​bacteriocide 
A)  ​pesticide 
B)  ​herbicide 
C)  ​fungicide 
D)  ​insecticide 
E)  ​bacteriocide B

Question 2

Which of the following is mismatched?

Accepted Answer

A)  ​cytokinin - inhibits lateral root formation 
B)  ​auxin - promotes cell elongation 
C)  ​gibberellin - involved in phototropism and gravitropism 
D)  ​abscisic acid - promotes stomatal closure 
E)  ​ethylene - promotes leaf abscission 
A)  ​cytokinin - inhibits lateral root formation 
B)  ​auxin - promotes cell elongation 
C)  ​gibberellin - involved in phototropism and gravitropism 
D)  ​abscisic acid - promotes stomatal closure 
E)  ​ethylene - promotes leaf abscission C

Question 3

When a shoot is lengthening at the tip, its lateral buds are usually dormant, an effect called __________.

Accepted Answer

​apical dominance

Question 4

A plant secretes ____ when it needs to respond defensively to a pathogen.

Accepted Answer

A)  ​salicylic acid 
B)  ​systemin 
C)  ​brassinosteroids 
D)  ​mineralocorticoids 
E)  ​nitric oxide 
A)  ​salicylic acid 
B)  ​systemin 
C)  ​brassinosteroids 
D)  ​mineralocorticoids 
E)  ​nitric oxide

Question 5

If a shoot's tip breaks off, its source of auxin disappears, so the __________ level rises in the stem.

Accepted Answer

The answer of If a shoot's tip breaks off, its...

Question 6

A mutant plant is found in which the seeds germinate far too early. Which hormone is likely involved and why?

Accepted Answer

​It is likely that abscisic acid is invo

Question 7

-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 8

Even though the autumn may be unusually warm, the leaves from deciduous trees begin to drop during September. Which of the following is the best explanation?​

Accepted Answer

A)  ​The trees are responding to shorter days. 
B)  The autumn months are usually wetter because the summer rains were delayed.​ 
C)  ​The effects of phototropism are operating "right on schedule." 
D)  ​There is not enough sunlight to carry on photosynthesis any longer. 
E)  ​The trees are responding to consistent temperatures. 
A)  ​The trees are responding to shorter days. 
B)  The autumn months are usually wetter because the summer rains were delayed.​ 
C)  ​The effects of phototropism are operating "right on schedule." 
D)  ​There is not enough sunlight to carry on photosynthesis any longer. 
E)  ​The trees are responding to consistent temperatures.

Question 9

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) ​plays a critical role in apical dominance 
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)​low-temperature stimulation of flowering
G)​closes stomata in times of stress
H)​stimulates fruit ripening
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)​stimulates growth of lateral buds
O)​mobilizes food reserves in germinating seeds 
A) ​growth response that orients parts of a plant in a direction influenced by light 
B) ​plays a critical role in apical dominance 
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)​low-temperature stimulation of flowering
G)​closes stomata in times of stress
H)​stimulates fruit ripening
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)​stimulates growth of lateral buds
O)​mobilizes food reserves in germinating seeds

Question 10

A hormonal signal is detected by ____.

Accepted Answer

A)  ​chloroplasts 
B)  ​transport proteins 
C)  ​receptor proteins 
D)  ​statoliths 
E)  ​plasma membranes 
A)  ​chloroplasts 
B)  ​transport proteins 
C)  ​receptor proteins 
D)  ​statoliths 
E)  ​plasma membranes

Question 11

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 12

If a shoot's tip breaks off, ____ moves into lateral buds and stimulates cell divisions.

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 13

__________ refers to an organism's response to changes in the length of day relative to night.

Accepted Answer

The answer of __________ refers to an organism's response to...

Question 14

Apical dominance is an effect that causes ____.

Accepted Answer

A)  ​a directional adjustment of growth in response to environmental stimuli 
B)  ​leaves and other plant parts to fall off, or senesce 
C)  ​roots to lengthen while inhibiting shoot growth 
D)  ​lateral buds to become active when a shoot is lengthening at its tip 
E)  ​lateral buds to stay dormant when a shoot is lengthening at its tip 
A)  ​a directional adjustment of growth in response to environmental stimuli 
B)  ​leaves and other plant parts to fall off, or senesce 
C)  ​roots to lengthen while inhibiting shoot growth 
D)  ​lateral buds to become active when a shoot is lengthening at its tip 
E)  ​lateral buds to stay dormant when a shoot is lengthening at its tip

Question 15

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) ​plays a critical role in apical dominance 
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)​low-temperature stimulation of flowering
G)​closes stomata in times of stress
H)​stimulates fruit ripening
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)​stimulates growth of lateral buds
O)​mobilizes food reserves in germinating seeds 
A) ​growth response that orients parts of a plant in a direction influenced by light 
B) ​plays a critical role in apical dominance 
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)​low-temperature stimulation of flowering
G)​closes stomata in times of stress
H)​stimulates fruit ripening
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)​stimulates growth of lateral buds
O)​mobilizes food reserves in germinating seeds

Question 16

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

Accepted Answer

A) ​growth response that orients parts of a plant in a direction influenced by light 
B) ​plays a critical role in apical dominance 
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)​low-temperature stimulation of flowering
G)​closes stomata in times of stress
H)​stimulates fruit ripening
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)​stimulates growth of lateral buds
O)​mobilizes food reserves in germinating seeds 
A) ​growth response that orients parts of a plant in a direction influenced by light 
B) ​plays a critical role in apical dominance 
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)​low-temperature stimulation of flowering
G)​closes stomata in times of stress
H)​stimulates fruit ripening
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)​stimulates growth of lateral buds
O)​mobilizes food reserves in germinating seeds

Question 17

In the root apical meristem, __________ supports division of undifferentiated meristem cells, and cytokinin signals the cells to differentiate.

Accepted Answer

The answer of In the root apical meristem, __________ supports...

Question 18

Perhaps a plant's greatest liability is its inability to ____.

Accepted Answer

A)  ​produce growth hormones 
B)  ​use aerobic respiration 
C)  ​move when conditions around it deteriorate 
D)  ​produce its own lipids and proteins 
E)  ​respond to dwindling supplies of nutrients and water 
A)  ​produce growth hormones 
B)  ​use aerobic respiration 
C)  ​move when conditions around it deteriorate 
D)  ​produce its own lipids and proteins 
E)  ​respond to dwindling supplies of nutrients and water

Question 19

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 20

During primary growth, auxin causes young cells to expand by increasing the activity of __________ that pump hydrogen ions from cytoplasm into the cell wall.

Accepted Answer

The answer of During primary growth, auxin causes young cells...

Exam 30: Communication Strategies in Plants

Synthetic auxin can be used as a(n) ____.

Which of the following is mismatched?

When a shoot is lengthening at the tip, its lateral buds are usually dormant, an effect called __________.

A plant secretes ____ when it needs to respond defensively to a pathogen.

If a shoot's tip breaks off, its source of auxin disappears, so the __________ level rises in the stem.

A mutant plant is found in which the seeds germinate far too early. Which hormone is likely involved and why?

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

Even though the autumn may be unusually warm, the leaves from deciduous trees begin to drop during September. Which of the following is the best explanation?​

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

A hormonal signal is detected by ____.

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

If a shoot's tip breaks off, ____ moves into lateral buds and stimulates cell divisions.

__________ refers to an organism's response to changes in the length of day relative to night.

Apical dominance is an effect that causes ____.

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

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

In the root apical meristem, __________ supports division of undifferentiated meristem cells, and cytokinin signals the cells to differentiate.

Perhaps a plant's greatest liability is its inability to ____.

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

During primary growth, auxin causes young cells to expand by increasing the activity of __________ that pump hydrogen ions from cytoplasm into the cell wall.

Invitation to Biology

Lifes Chemical Basis

Molecules of Life

Cell Structure and Function

Ground Rules of Metabolism

Where It Starts - Photosynthesis

How Cells Release Chemical Energy

Dna Structure and Function

From Dna to Protein

Gene Control

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

Organizating Information About Species

Lifes Origin and Early Evolution

Viruses - Bacteria - and Archaea

Protists - the Simplest Eukaryotes

The Land Plants

Fungi

Animal Evolution - the Invertibrates

Animal Evolution - the Chordates

Human Evolution

Plant Tissues

Plant Nutrition and Transport

Life Cycles of Flowering Plants

Animal Tissues

Neural Control

Sensory Perception

Endocrine Control

Structural Support and Movement

Circulation

Immunity

Respiration

Digestion and Nutrition

Maintaining the Internal Environment

Animal Reproductive Systems

Animal Development

Animal Behavior

Filters

Even though the autumn may be unusually warm, the leaves from deciduous trees begin to drop during September. Which of the following is the best explanation?

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

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

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