Question 1

Which hormone promotes cell elongation by changing plant cell walls so they can expand due to the force of turgor pressure?

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 2

Differentiate between circadian rhythms and photoperiodism. Give examples of each. What regulates these responses?

Accepted Answer

Concepts to Consider: Photoperiodism is

Question 3

When cytokinins are sprayed on leaves of a cut stem, the leaves become, or remain, yellow .

Accepted Answer

A) True 
 B)False

Question 4

Auxin sprayed on tomato flowers stimulates the ____ to develop without the formation of ____.

Accepted Answer

A)  roots; root hairs 
B)  fruit; ovaries 
C)  seeds; ovaries 
D)  ovary; seeds 
E)  seeds; fruits 
A)  roots; root hairs 
B)  fruit; ovaries 
C)  seeds; ovaries 
D)  ovary; seeds 
E)  seeds; fruits

Question 5

Brassinosteroids differ from other plant hormones in that they are:

Accepted Answer

A)  peptides. 
B)  steroids. 
C)  derivatives of adenine. 
D)  derivatives of aspirin. 
E)  derivatives of prostaglandins. 
A)  peptides. 
B)  steroids. 
C)  derivatives of adenine. 
D)  derivatives of aspirin. 
E)  derivatives of prostaglandins.

Question 6

Cryptochrome absorbs blue light.

Accepted Answer

A) True 
 B)False

Question 7

The twining of tendrils around a support is an example of thigmomorphogenesis .

Accepted Answer

A) True 
 B)False

Question 8

The photoreceptor that absorbs blue light and triggers a phototropic response is:

Accepted Answer

A)  phototropin. 
B)  phytochrome. 
C)  jasmonate. 
D)  systemin. 
E)  zeatin. 
A)  phototropin. 
B)  phytochrome. 
C)  jasmonate. 
D)  systemin. 
E)  zeatin.

Question 9

____ is a synthetic auxin that stimulates root development on stem cuttings and is used extensively in asexual propagation.

Accepted Answer

A)  Indoleacetic acid 
B)  Indolebutyric acid 
C)  Naphthalene acetic acid 
D)  2,4-D 
E)  2,4,5-T 
A)  Indoleacetic acid 
B)  Indolebutyric acid 
C)  Naphthalene acetic acid 
D)  2,4-D 
E)  2,4,5-T

Question 10

Which statement concerning the auxin F-box protein is false ?

Accepted Answer

A)  It is located in the nucleus. 
B)  It is a type of receptor. 
C)  It is involved in catalyzing the addition of ubiquitin tags. 
D)  Plants have about 700 of these. 
E)  An example is the transport inhibitor response 1 protein. 
A)  It is located in the nucleus. 
B)  It is a type of receptor. 
C)  It is involved in catalyzing the addition of ubiquitin tags. 
D)  Plants have about 700 of these. 
E)  An example is the transport inhibitor response 1 protein.

Question 11

A plant growth response to mechanical stress, such as rain and contact with passing animals, is known as:

Accepted Answer

A)  phototropism. 
B)  gravitropism. 
C)  thigmomorphogensis. 
D)  a circadian rhythm. 
E)  thigmotropism. 
A)  phototropism. 
B)  gravitropism. 
C)  thigmomorphogensis. 
D)  a circadian rhythm. 
E)  thigmotropism.

Question 12

In barley seed germination, the ____ releases gibberellin, which triggers the synthesis of ____ in the ____.

Accepted Answer

A)  seed coat; α -amylase; embryo 
B)  endosperm; cellulase; embryo 
C)  embryo; α -amylase; endosperm 
D)  embryo; cellulase; seed coat 
E)  endosperm; β -amylase; embryo 
A)  seed coat; α -amylase; embryo 
B)  endosperm; cellulase; embryo 
C)  embryo; α -amylase; endosperm 
D)  embryo; cellulase; seed coat 
E)  endosperm; β -amylase; embryo

Question 13

Which statement concerning phytochrome-induced responses is false ?

Accepted Answer

A)  All responses are very rapid and short-term. 
B)  Red light causes potassium channels to open. 
C)  The absorption of light by one part of the phytochrome molecule triggers a conformational change in another part. 
D)  Phytochrome activates transcription of the gene for a subunit of rubisco. 
E)  Far-red light causes potassium channels to close. 
A)  All responses are very rapid and short-term. 
B)  Red light causes potassium channels to open. 
C)  The absorption of light by one part of the phytochrome molecule triggers a conformational change in another part. 
D)  Phytochrome activates transcription of the gene for a subunit of rubisco. 
E)  Far-red light causes potassium channels to close.

Question 14

Which hormone promotes stem elongation and was first discovered while studying the growth of extremely tall and spindly rice plants?

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 15

What hypothetical hormone promotes flowering but has never been successfully isolated?

Accepted Answer

A)  florigen 
B)  ubiquitin 
C)  jasmonic acid 
D)  brassinosteroids 
E)  methyl salicylate 
A)  florigen 
B)  ubiquitin 
C)  jasmonic acid 
D)  brassinosteroids 
E)  methyl salicylate

Question 16

Match between columns
                        Premises: Coleus
flowering does not respond to light length
Arabidoposis
Cocklebur
flowers when the night length is equal to or greater than some critical period
flowers when the night length is equal to or less than some critical period.
does not flower when night length is too long or too short
Cucumber

Accepted Answer

The Answer of day neutral plant and short day plant is...

Question 17

Write a one-sentence explanation for the role of each of the following plant hormonelike signaling molecules: methyl salicylate and jasmonic acid.

Accepted Answer

Methyl salicylate triggers a signal tran

Question 18

An example of a long-day plant is:

Accepted Answer

A)  poinsettia. 
B)  florist's chrysanthemum. 
C)  sunflower. 
D)  black-eyed Susan. 
E)  sugarcane. 
A)  poinsettia. 
B)  florist's chrysanthemum. 
C)  sunflower. 
D)  black-eyed Susan. 
E)  sugarcane.

Question 19

Changing day length, as well as variations in precipitation and temperature, are environmental cues that exert an important influence on:

Accepted Answer

A)  the kinds of genes a plant has. 
B)  the number of mutations that genes undergo. 
C)  whether a plant is an annual, biennial, or perennial. 
D)  which genes will be expressed in a plant. 
E)  whether a plant reproduces sexually or asexually. 
A)  the kinds of genes a plant has. 
B)  the number of mutations that genes undergo. 
C)  whether a plant is an annual, biennial, or perennial. 
D)  which genes will be expressed in a plant. 
E)  whether a plant reproduces sexually or asexually.

Question 20

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 the equilibrium between Pr and Pfr. 
A)  inactivate phytochrome. 
B)  convert Pfr to Pr. 
C)  inhibit germination in some seeds. 
D)  initiate shade avoidance responses. 
E)  impact the equilibrium between Pr and Pfr.

Exam 38: Plant Developmental Responses to External and Internal Signals

Which hormone promotes cell elongation by changing plant cell walls so they can expand due to the force of turgor pressure?

Differentiate between circadian rhythms and photoperiodism. Give examples of each. What regulates these responses?

When cytokinins are sprayed on leaves of a cut stem, the leaves become, or remain, yellow .

Auxin sprayed on tomato flowers stimulates the ____ to develop without the formation of ____.

Brassinosteroids differ from other plant hormones in that they are:

Cryptochrome absorbs blue light.

The twining of tendrils around a support is an example of thigmomorphogenesis .

The photoreceptor that absorbs blue light and triggers a phototropic response is:

____ is a synthetic auxin that stimulates root development on stem cuttings and is used extensively in asexual propagation.

Which statement concerning the auxin F-box protein is false ?

A plant growth response to mechanical stress, such as rain and contact with passing animals, is known as:

In barley seed germination, the ____ releases gibberellin, which triggers the synthesis of ____ in the ____.

Which statement concerning phytochrome-induced responses is false ?

Which hormone promotes stem elongation and was first discovered while studying the growth of extremely tall and spindly rice plants?

What hypothetical hormone promotes flowering but has never been successfully isolated?

Write a one-sentence explanation for the role of each of the following plant hormonelike signaling molecules: methyl salicylate and jasmonic acid.

An example of a long-day plant is:

Changing day length, as well as variations in precipitation and temperature, are environmental cues that exert an important influence on:

The effect of red light on plants is to:

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

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Auxin sprayed on tomato flowers stimulates the to develop without the formation of .

In barley seed germination, the releases gibberellin, which triggers the synthesis of in the .