Question 1

In trees,such as the horse chestnut,the abscission of leaves and fruits in the fall is mediated by ____.

Accepted Answer

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

Question 2

Temperature extremes,lack of water,and other environmental stresses trigger an increase in ____ synthesis,release,and transport,which helps the plant survive the adverse conditions.

Accepted Answer

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

Question 3

________________ is a directional response to light.

Accepted Answer

The answer of ________________ is a directional response to light....

Question 4

The pigment most involved with photoperiodism is ____.

Accepted Answer

A)  chlorophyll 
B)  xanthophyll 
C)  anthocyanin 
D)  phytochrome 
E)  phycoerythrin 
A)  chlorophyll 
B)  xanthophyll 
C)  anthocyanin 
D)  phytochrome 
E)  phycoerythrin

Question 5

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 division...

Question 6

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

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

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

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 8

Plants release _______ in response to attack by herbivores to signal and elicit responses from other plants and animals.

Accepted Answer

A)  volatile secondary metabolites 
B)  hormones 
C)  abscisic acid 
D)  immune modulators 
E)  poison 
A)  volatile secondary metabolites 
B)  hormones 
C)  abscisic acid 
D)  immune modulators 
E)  poison

Question 9

A light-sensitive pigment that helps set plant circadian rhythms based on length of night is known as __________.

Accepted Answer

A)  phytochrome 
B)  chlorophyll 
C)  thigmotropism 
D)  ribosomes 
E)  statoliths 
A)  phytochrome 
B)  chlorophyll 
C)  thigmotropism 
D)  ribosomes 
E)  statoliths

Question 10

Downward bending of a seedling root can be blocked by ____.

Accepted Answer

A)  moving it to a dark room 
B)  exposing the seedling to continuous light 
C)  turning the seedling upside down 
D)  inhibiting cytokinin transport upwards 
E)  inhibiting auxin transport downwards 
A)  moving it to a dark room 
B)  exposing the seedling to continuous light 
C)  turning the seedling upside down 
D)  inhibiting cytokinin transport upwards 
E)  inhibiting auxin transport downwards

Question 11

Auxin is actively pumped into cells by _____ carriers and out of cells by _________ carriers.

Accepted Answer

The answer of Auxin is actively pumped into cells by...

Question 12

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

Accepted Answer

A)  pesticide 
B)  herbicide 
C)  fungicide 
D)  insecticide 
E)  bactericide 
A)  pesticide 
B)  herbicide 
C)  fungicide 
D)  insecticide 
E)  bactericide

Question 13

The requirement of cold weather before a particular plant process occurs (e.g.,germination)is known as ____.

Accepted Answer

A)  the biological clock 
B)  vernalization 
C)  photoperiodism 
D)  biennial life cycle 
E)  perennial life cycle 
A)  the biological clock 
B)  vernalization 
C)  photoperiodism 
D)  biennial life cycle 
E)  perennial life cycle

Question 14

Farmers spray seedless grape plants with synthetic __________,which increases the size of the resulting fruit.

Accepted Answer

The answer of Farmers spray seedless grape plants with synthetic...

Question 15

Respond to the following statements in reference to the five plant hormones listed below.
-This hormone mediates tropisms.

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 16

Respond to the following statements in reference to the five plant hormones listed below.
-This hormone causes a stem to lengthen between the nodes by inducing cell division and elongation.

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 17

Cycles of biological activity that are repeated every 24 hours are called ____.

Accepted Answer

A)  systemic acquired rhythms 
B)  tropisms 
C)  physiological requirements 
D)  circadian rhythms 
E)  photoperiods 
A)  systemic acquired rhythms 
B)  tropisms 
C)  physiological requirements 
D)  circadian rhythms 
E)  photoperiods

Question 18

A ____ is an extracellular signaling molecule that exerts its effect at very low concentrations.

Accepted Answer

A)  statolith 
B)  protein receptor 
C)  plant hormone 
D)  cytochrome 
E)  phytochrome 
A)  statolith 
B)  protein receptor 
C)  plant hormone 
D)  cytochrome 
E)  phytochrome

Question 19

Of the following choices,what is the only way for bacteria to enter into plant tissues?

Accepted Answer

A)  Shoot tip 
B)  Intact epidermis 
C)  Lateral bud 
D)  Ground tissue 
E)  Open stomata 
A)  Shoot tip 
B)  Intact epidermis 
C)  Lateral bud 
D)  Ground tissue 
E)  Open stomata

Question 20

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

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

Exam 30: Communication Strategies in Plants

In trees,such as the horse chestnut,the abscission of leaves and fruits in the fall is mediated by ____.

Temperature extremes,lack of water,and other environmental stresses trigger an increase in ____ synthesis,release,and transport,which helps the plant survive the adverse conditions.

________________ is a directional response to light.

The pigment most involved with photoperiodism is ____.

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

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

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

Plants release _______ in response to attack by herbivores to signal and elicit responses from other plants and animals.

A light-sensitive pigment that helps set plant circadian rhythms based on length of night is known as __________.

Downward bending of a seedling root can be blocked by ____.

Auxin is actively pumped into cells by _____ carriers and out of cells by _________ carriers.

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

The requirement of cold weather before a particular plant process occurs (e.g.,germination)is known as ____.

Farmers spray seedless grape plants with synthetic __________,which increases the size of the resulting fruit.

Respond to the following statements in reference to the five plant hormones listed below. -This hormone mediates tropisms.

Respond to the following statements in reference to the five plant hormones listed below. -This hormone causes a stem to lengthen between the nodes by inducing cell division and elongation.

Cycles of biological activity that are repeated every 24 hours are called ____.

A ____ is an extracellular signaling molecule that exerts its effect at very low concentrations.

Of the following choices,what is the only way for bacteria to enter into plant tissues?

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

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

Auxin is actively pumped into cells by _ carriers and out of cells by _____ carriers.