Question 1

Phototropic responses may vary according to light intensity.

Accepted Answer

A) True 
 B)False  True

Question 2

Which of the following play a major role in water-conservation movements of grasses?

Accepted Answer

A)  Bulliform cells 
B)  Epidermal cells 
C)  Mesophyll cells 
D)  Glands 
E)  Fibers 
A)  Bulliform cells 
B)  Epidermal cells 
C)  Mesophyll cells 
D)  Glands 
E)  Fibers A

Question 3

Day-neutral plants do not need light in order to flower.

Accepted Answer

A) True 
 B)False  False

Question 4

Which of the following pertaining to auxins is true?

Accepted Answer

A)  Their migration from the cells where they originate is relatively slow. 
B)  Their movement is polar. 
C)  Their movement requires the expenditure of energy stored in ATP molecules. 
D)  They tend to proceed through parenchyma cells surrounding vascular bundles. 
E)  All of these answers are correct. 
A)  Their migration from the cells where they originate is relatively slow. 
B)  Their movement is polar. 
C)  Their movement requires the expenditure of energy stored in ATP molecules. 
D)  They tend to proceed through parenchyma cells surrounding vascular bundles. 
E)  All of these answers are correct.

Question 5

The fruit ripening process releases large quantities of

Accepted Answer

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

Question 6

Which plant hormone was isolated from a fungus causing "foolish-seedling disease"?

Accepted Answer

A)  Cytokinin 
B)  Auxin 
C)  Ethylene 
D)  Gibberellin 
E)  ABA 
A)  Cytokinin 
B)  Auxin 
C)  Ethylene 
D)  Gibberellin 
E)  ABA

Question 7

The flowering of Arabidopsis is a result of turning on a gene called _______________________ which produces of a protein that moves from the leaves to the buds to initiate flowering.

Accepted Answer

A)  phytochrome 
B)  CONSTANS 
C)  florigen 
D)  FLOWERING TIME 
E)  gibberellin 
A)  phytochrome 
B)  CONSTANS 
C)  florigen 
D)  FLOWERING TIME 
E)  gibberellin

Question 8

There probably is only one auxin naturally produced by plants.

Accepted Answer

A) True 
 B)False

Question 9

One cellular process that is affected by auxin is the ____________________.

Accepted Answer

A)  promotion of cell division in the cambium 
B)  stimulation of ion transport into the vacuole 
C)  formation of chloroplasts 
D)  inhibition of ATP synthesis 
E)  opening of stomates 
A)  promotion of cell division in the cambium 
B)  stimulation of ion transport into the vacuole 
C)  formation of chloroplasts 
D)  inhibition of ATP synthesis 
E)  opening of stomates

Question 10

Which of the following is synthesized from carotenoid pigments in plastids?

Accepted Answer

A)  Abscisic acid 
B)  Gibberellins 
C)  Ethylene 
D)  Auxins 
E)  Cytokinins 
A)  Abscisic acid 
B)  Gibberellins 
C)  Ethylene 
D)  Auxins 
E)  Cytokinins

Question 11

Quiescence and dormancy with respect to seeds means exactly the same thing: that is, the embryo of a seed does not grow even if the conditions for growth are favorable.

Accepted Answer

A) True 
 B)False

Question 12

Commercial chrysanthemum growers may use a growth retardant to produce short, sturdy plants.It acts by blocking synthesis of ______________.

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 13

The plant physiologist credited with the discovery of auxins was

Accepted Answer

A) Frits Went. 
B) Charles Darwin. 
C) Francis Darwin. 
D) R.F.M.van Steveninck. 
E) P.F.Wareing. 
A) Frits Went. 
B) Charles Darwin. 
C) Francis Darwin. 
D) R.F.M.van Steveninck. 
E) P.F.Wareing.

Question 14

The pigment phytochrome has only one role in plant development; that role is involvement in plant photoperiodism.

Accepted Answer

A) True 
 B)False

Question 15

The most important effect of cytokinin is its influence on

Accepted Answer

A)  cell division. 
B)  stomatal opening. 
C)  cell elongation. 
D)  flowering. 
E)  dormancy. 
A)  cell division. 
B)  stomatal opening. 
C)  cell elongation. 
D)  flowering. 
E)  dormancy.

Question 16

The defoliant Agent Orange was a 1-to-1 mixture of 2,4-D and

Accepted Answer

A)  TCDD. 
B)  2,4,5-T. 
C)  DDT. 
D)  TCP. 
E)  2,4,6-Z. 
A)  TCDD. 
B)  2,4,5-T. 
C)  DDT. 
D)  TCP. 
E)  2,4,6-Z.

Question 17

Variation in day and night temperatures may influence a species growth rate.

Accepted Answer

A) True 
 B)False

Question 18

The movement of a leaf blade on its petiole to keep the blade oriented perpendicular to the sun's rays throughout the day is facilitated by

Accepted Answer

A)  bulliform cells. 
B)  motor cells. 
C)  tracheids. 
D)  passage cells. 
E)  laticifers. 
A)  bulliform cells. 
B)  motor cells. 
C)  tracheids. 
D)  passage cells. 
E)  laticifers.

Question 19

___________ is defined as an irreversible increase in mass due to the division and enlargement of cells.

Accepted Answer

A)  Development 
B)  Differentiation 
C)  Determination 
D)  Growth 
E)  Change 
A)  Development 
B)  Differentiation 
C)  Determination 
D)  Growth 
E)  Change

Question 20

Internal environmental factors coordinating plant growth and development include ________.

Accepted Answer

A)  water quality 
B)  light 
C)  hormones 
D)  temperature 
E)  day length 
A)  water quality 
B)  light 
C)  hormones 
D)  temperature 
E)  day length

Exam 11: Growth

Phototropic responses may vary according to light intensity.

Which of the following play a major role in water-conservation movements of grasses?

Day-neutral plants do not need light in order to flower.

Which of the following pertaining to auxins is true?

The fruit ripening process releases large quantities of

Which plant hormone was isolated from a fungus causing "foolish-seedling disease"?

The flowering of Arabidopsis is a result of turning on a gene called _______________________ which produces of a protein that moves from the leaves to the buds to initiate flowering.

There probably is only one auxin naturally produced by plants.

One cellular process that is affected by auxin is the ____________________.

Which of the following is synthesized from carotenoid pigments in plastids?

Quiescence and dormancy with respect to seeds means exactly the same thing: that is, the embryo of a seed does not grow even if the conditions for growth are favorable.

Commercial chrysanthemum growers may use a growth retardant to produce short, sturdy plants.It acts by blocking synthesis of ______________.

The plant physiologist credited with the discovery of auxins was

The pigment phytochrome has only one role in plant development; that role is involvement in plant photoperiodism.

The most important effect of cytokinin is its influence on

The defoliant Agent Orange was a 1-to-1 mixture of 2,4-D and

Variation in day and night temperatures may influence a species growth rate.

The movement of a leaf blade on its petiole to keep the blade oriented perpendicular to the sun's rays throughout the day is facilitated by

___________ is defined as an irreversible increase in mass due to the division and enlargement of cells.

Internal environmental factors coordinating plant growth and development include ________.

What Is Plant Biology

The Nature of Life

Cells

Tissues

Roots and Soils

Stems

Leaves

Flowers, Fruits, and Seeds

Water in Plants

Plant Metabolism

Meiosis and Alternation of Generation

Genetics

Plant Breeding and Propagation

Evolution

Plant Names and Classification

Domain Kingdombacteria, Domain King-Domarchaea, and Viruses

Kingdom Protista

Kingdom Fungi

Introduction to the Plant Kingdom: Bryophytes

The Seedless Vascular Plants: Ferns and Their Relatives

Introduction to Seed Plants: Gymnosperms

Seed Plants: Angiosperms

Flowering Plants and Civilization

Ecology

Biomes

Filters