Question 1

Ethylene stimulates the ripening of fruits.
____________________

Accepted Answer

A) True 
 B)False  True

Question 2

MATCHING
Match the plant hormone with its description.
a.abscisic acid
d.cytokinin
b.auxin
e.ethylene
c.brassinosteroid
f.gibberellin
-closes stomata of plants suffering from water stress

Accepted Answer

B

Question 3

What am I? I am structurally related to aspirin, and I help defend plants against insect attack.

Accepted Answer

A)  systemin 
B)  jasmonates 
C)  brassinosteroids 
D)  methyl salicylate 
E)  oligosaccharins 
A)  systemin 
B)  jasmonates 
C)  brassinosteroids 
D)  methyl salicylate 
E)  oligosaccharins D

Question 4

The effect of red light on plants is to:

Accepted Answer

A)  inactivate phytochrome. 
B)  convert Pfr to Pr. 
C)  inhibit germination in some seeds. 
D)  initiate shade avoidance responses. 
E)  impact processes in plants that use phytochrome to detect day length. 
A)  inactivate phytochrome. 
B)  convert Pfr to Pr. 
C)  inhibit germination in some seeds. 
D)  initiate shade avoidance responses. 
E)  impact processes in plants that use phytochrome to detect day length.

Question 5

Figure 38-1
Use the figure to answer the corresponding question(s).  
-One conclusion that can be drawn from Figure 38-1 is that:

Accepted Answer

A)  a low ratio of auxin to cytokinin stimulates root development. 
B)  a low ratio of auxin to cytokinin stimulates shoot development. 
C)  a low ratio of auxin to cytokinin results in undifferentiated growth. 
D)  a low ratio of auxin to cytokinin stimulates the formation of an entire plant. 
E)  a low ratio of auxin to cytokinin results in no growth. 
A)  a low ratio of auxin to cytokinin stimulates root development. 
B)  a low ratio of auxin to cytokinin stimulates shoot development. 
C)  a low ratio of auxin to cytokinin results in undifferentiated growth. 
D)  a low ratio of auxin to cytokinin stimulates the formation of an entire plant. 
E)  a low ratio of auxin to cytokinin results in no growth.

Question 6

Figure 38-2
Use the figure to answer the corresponding question(s).  
-Refer to Figure 38-2.The photoperiodic response of the plant in row a suggests:

Accepted Answer

A)  a brief dark period is the light cue that induces flowering. 
B)  a brief daylight period is the light cue that induces flowering. 
C)  a long uninterrupted daylight period is the light cue that induces flowering. 
D)  a long uninterrupted dark period is the light cue that induces flowering. 
E)  Cannot be determined from the data provided. 
A)  a brief dark period is the light cue that induces flowering. 
B)  a brief daylight period is the light cue that induces flowering. 
C)  a long uninterrupted daylight period is the light cue that induces flowering. 
D)  a long uninterrupted dark period is the light cue that induces flowering. 
E)  Cannot be determined from the data provided.

Question 7

Examples of long-day plants are:

Accepted Answer

A)  poinsettia. 
B)  florist's chrysanthemum. 
C)  spinach. 
D)  black-eyed Susan. 
E)  both spinach and black-eyed Susans. 
A)  poinsettia. 
B)  florist's chrysanthemum. 
C)  spinach. 
D)  black-eyed Susan. 
E)  both spinach and black-eyed Susans.

Question 8

Which of the following sequences correctly represents the phytochrome signal transduction pathway?

Accepted Answer

A)  red light $\rightarrow$PIF3 activation $\rightarrow$PIF3 into nucleus $\rightarrow$light-responsive gene switched off 
B)  red light$\rightarrow$Pfr to Pr $\rightarrow$ Pr into nucleus $\rightarrow$ Pr-PIF3 complex $\rightarrow$light-responsive gene regulation 
C)  UV light $\rightarrow$ PIF3 into nucleus $\rightarrow$light responsive gene produces phytochrome $\rightarrow$ Pr to Pfr 
D)  blue light $\rightarrow$ Pfr into nucleus $\rightarrow$Pfr-PIF3 complex $\rightarrow$light-responsive gene regulation 
E)  red light$\rightarrow$Pr to Pfr $\rightarrow$Pfr into nucleus $\rightarrow$ Pfr-PIF3 complex $\rightarrow$light-responsive gene regulation 
A)  red light $\rightarrow$PIF3 activation $\rightarrow$PIF3 into nucleus $\rightarrow$light-responsive gene switched off 
B)  red light$\rightarrow$Pfr to Pr $\rightarrow$ Pr into nucleus $\rightarrow$ Pr-PIF3 complex $\rightarrow$light-responsive gene regulation 
C)  UV light $\rightarrow$ PIF3 into nucleus $\rightarrow$light responsive gene produces phytochrome $\rightarrow$ Pr to Pfr 
D)  blue light $\rightarrow$ Pfr into nucleus $\rightarrow$Pfr-PIF3 complex $\rightarrow$light-responsive gene regulation 
E)  red light$\rightarrow$Pr to Pfr $\rightarrow$Pfr into nucleus $\rightarrow$ Pfr-PIF3 complex $\rightarrow$light-responsive gene regulation

Question 9

Grand Rapids variety of lettuce produces seeds that will not germinate unless they are exposed to light.Phytochrome is also involved in that exposure to red light stimulates germination and far-red light inhibits germination.However, the effect of red light can be reversed by an immediate exposure to far-red light--and vice versa.You design an experiment in which you expose seeds of Grand Rapids lettuce first to red light, then immediately to far-red light, and then immediately to red light again.Would these seeds germinate? Use your knowledge of the phytochrome molecule to explain your reasoning.What if the seeds were exposed first to red light, then immediately to far-red light, then immediately to red light again, and then immediately to far-red light again?

Accepted Answer

Concepts to Consider: Phytochrome exists

Question 10

Figure 38-2
Use the figure to answer the corresponding question(s).  
-The plant in row b of Figure 38-2 demonstrates a photoperiodic response characteristic of:

Accepted Answer

A)  short-day plants. 
B)  day-neutral plants. 
C)  long-day plants. 
D)  long-night plants. 
E)  intermediate-day plants. 
A)  short-day plants. 
B)  day-neutral plants. 
C)  long-day plants. 
D)  long-night plants. 
E)  intermediate-day plants.

Question 11

Figure 38-2
Use the figure to answer the corresponding question(s).  
-Phy B may inhibit flowering in:

Accepted Answer

A)  day-neutral plants. 
B)  vernalized plants. 
C)  long-day plants. 
D)  senescing plants. 
E)  short-day plants. 
A)  day-neutral plants. 
B)  vernalized plants. 
C)  long-day plants. 
D)  senescing plants. 
E)  short-day plants.

Question 12

__________ is growth in response to a mechanical stimulus, such as contact with a solid object.

Accepted Answer

A)  Heliotropism 
B)  Phototropism 
C)  Gravitropism 
D)  Thigmotropism 
E)  Geotropic bending 
A)  Heliotropism 
B)  Phototropism 
C)  Gravitropism 
D)  Thigmotropism 
E)  Geotropic bending

Question 13

When you shine light having a wavelength of 660 nm on a plant, which of the following will most likely happen next?

Accepted Answer

A)  Pfr is stored for later use. 
B)  Pr is synthesized. 
C)  Pr is converted to Pfr. 
D)  Pfr is converted to Pr. 
E)  Pr is degraded. 
A)  Pfr is stored for later use. 
B)  Pr is synthesized. 
C)  Pr is converted to Pfr. 
D)  Pfr is converted to Pr. 
E)  Pr is degraded.

Question 14

MATCHING
Match the plant hormone with its description.
a.abscisic acid
d.cytokinin
b.auxin
e.ethylene
c.brassinosteroid
f.gibberellin
-inhibits the growth of axillary buds

Accepted Answer

The answer of MATCHING
Match the plant hormone with its description.
a.abscisic...

Question 15

If you planted two gardens, one in the sun and one in the shade, the plants grown in the shade would most likely be __________ because chlorophyll absorbs more __________.

Accepted Answer

A)  shorter; far-red light than red light 
B)  shorter; red light than far-red light 
C)  taller; red light than far-red light 
D)  taller; far-red light than red light 
E)  shorter; cryptochrome than phytochrome 
A)  shorter; far-red light than red light 
B)  shorter; red light than far-red light 
C)  taller; red light than far-red light 
D)  taller; far-red light than red light 
E)  shorter; cryptochrome than phytochrome

Question 16

If you wished to obtain the strongest phototropic response from a shoot, which wavelength of light would you use?

Accepted Answer

A)  less than 500 nm 
B)  660 nm 
C)  730 nm 
D)  800 nm 
E)  more than 800 nm 
A)  less than 500 nm 
B)  660 nm 
C)  730 nm 
D)  800 nm 
E)  more than 800 nm

Question 17

Phototropins are light-activated kinases.
____________________

Accepted Answer

A) True 
 B)False

Question 18

Figure 38-2
Use the figure to answer the corresponding question(s).  
-The photoreceptor for photoperiodism and some other light-initiated plant responses is a group of blue-green pigments named:

Accepted Answer

A)  xanthophyll. 
B)  carotene. 
C)  chlorophyll. 
D)  phytochrome. 
E)  phycocyanin. 
A)  xanthophyll. 
B)  carotene. 
C)  chlorophyll. 
D)  phytochrome. 
E)  phycocyanin.

Question 19

Figure 38-1
Use the figure to answer the corresponding question(s).  
-Unripe green fruits ripen quickly in supermarkets or commercial storage facilities after exposure to:

Accepted Answer

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

Question 20

Figure 38-1
Use the figure to answer the corresponding question(s).  
-Which hormone stimulates both leaf abscission and fruit ripening?

Accepted Answer

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

Exam 38: Plant Developmental Responses to External and Internal Signals

Ethylene stimulates the ripening of fruits. ____________________

MATCHING Match the plant hormone with its description. a.abscisic acid d.cytokinin b.auxin e.ethylene c.brassinosteroid f.gibberellin -closes stomata of plants suffering from water stress

What am I? I am structurally related to aspirin, and I help defend plants against insect attack.

The effect of red light on plants is to:

Figure 38-1 Use the figure to answer the corresponding question(s). -One conclusion that can be drawn from Figure 38-1 is that:

Figure 38-2 Use the figure to answer the corresponding question(s). -Refer to Figure 38-2.The photoperiodic response of the plant in row a suggests:

Examples of long-day plants are:

Which of the following sequences correctly represents the phytochrome signal transduction pathway?

Figure 38-2 Use the figure to answer the corresponding question(s). -The plant in row b of Figure 38-2 demonstrates a photoperiodic response characteristic of:

Figure 38-2 Use the figure to answer the corresponding question(s). -Phy B may inhibit flowering in:

__________ is growth in response to a mechanical stimulus, such as contact with a solid object.

When you shine light having a wavelength of 660 nm on a plant, which of the following will most likely happen next?

MATCHING Match the plant hormone with its description. a.abscisic acid d.cytokinin b.auxin e.ethylene c.brassinosteroid f.gibberellin -inhibits the growth of axillary buds

If you planted two gardens, one in the sun and one in the shade, the plants grown in the shade would most likely be __________ because chlorophyll absorbs more __________.

If you wished to obtain the strongest phototropic response from a shoot, which wavelength of light would you use?

Phototropins are light-activated kinases. ____________________

Figure 38-2 Use the figure to answer the corresponding question(s). -The photoreceptor for photoperiodism and some other light-initiated plant responses is a group of blue-green pigments named:

Figure 38-1 Use the figure to answer the corresponding question(s). -Unripe green fruits ripen quickly in supermarkets or commercial storage facilities after exposure to:

Figure 38-1 Use the figure to answer the corresponding question(s). -Which hormone stimulates both leaf abscission and fruit ripening?

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna: the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters

If you planted two gardens, one in the sun and one in the shade, the plants grown in the shade would most likely be because chlorophyll absorbs more .