Question 1

Which of the following is a possible use for genetically modified crops?

Accepted Answer

A)   vaccine production
B)   improved yield
C)   herbicide resistance
D)   improved nutritional value
E)   All of the above are possible uses for genetically modified crops.F) A) and D)
G) C) and D) E

Question 2

The application of abscisic acid to a plant may prevent fruit maturation.

Accepted Answer

A) True 
 B)False

Question 3

Flowering in most plants is triggered by

Accepted Answer

A)   auxin migration.
B)   night length.
C)   day length.
D)   gibberellin production.
E)   negative phototropism.F) B) and C)
G) A) and E) B

Question 4

Peaches may be ripened at home by enclosing them in a paper bag. This is due to the production of which hormone?

Accepted Answer

A)   auxin
B)   cytokinin
C)   ethylene
D)   abscisic acid
E)   gibberellinsF) C) and D)
G) D) and E)

Question 5

In order for senescence to be prevented, which hormone needs to be present in the plant?

Accepted Answer

A)   gibberellins
B)   cytokinins
C)   abscisic acid
D)   ethylene
E)   auxinF) A) and B)
G) C) and D)

Question 6

What is the role of auxin in regards to plant growth?

Accepted Answer

A)   Auxin softens the cell wall enabling the cells to grow.
B)   Auxin disintegrates the cell wall in a plant allowing two cells to enlarge into one.
C)   Auxin will stunt plant growth.
D)   Auxin will increase the rate at which plant cells can grow.
E)   Auxin will decrease the rate at which plant cells grow.F) C) and E)
G) B) and E) A

Question 7

Monocot seeds differ from eudicot seeds because in monocot seeds

Accepted Answer

A)   the cotyledons absorb the stored food of the endosperm.
B)   the endosperm is retained.
C)   there are two cotyledons instead of one.
D)   there is no seed coat.
E)   the endosperm develops into the embryo.F) B) and C)
G) B) and D)

Question 8

Phytochrome red (P r)  differs from phytochrome far-red (P fr)  in that

Accepted Answer

A)   P r is converted to P fr during the nighttime.
B)   P r is converted to P fr by absorbing sunlight.
C)   P fr is converted to P r by absorbing sunlight.
D)   P fr is converted to P r by absorbing far-red light that is available at dusk.
E)   P r is converted to P fr by absorbing far-red light, which is available only during full daylight.F) A) and E)
G) C) and D)

Question 9

Plant hormones are

Accepted Answer

A)   are only found in the growing root tip.
B)   only control plant growth.
C)   produced only in the apical meristem.
D)   only found in monocots.
E)   are chemical signals between cells and tissues.F) All of the above
G) C) and D)

Question 10

Cytokinins may help promote the growth of new plants in tissue culture.

Accepted Answer

A) True 
 B)False

Question 11

Which of the following events will occur if gibberellins are applied to barley?

Accepted Answer

A)   the lateral meristems will be inhibited and the plant growth will cease
B)   the starchy endosperm will be broken down and converted into sugars for the developing embryo
C)   the stomata will remain closed to avoid the loss of water from the plant
D)   plant growth will be accelerated as the stems elongate
E)   the plant will produce fewer seeds than normalF) D) and E)
G) A) and C)

Question 12

Ethylene stimulates fruit ripening by stimulating

Accepted Answer

A)   the transport of hydrogen ions out of the cell.
B)   the production of amylase for starch breakdown.
C)   bacterial activity which softens the fruit.
D)   cellulase to break down cellulose in cell walls.
E)   mitosis of cells within the fruit to promote fruit growth.F) B) and C)
G) A) and E)

Question 13

Which of the following is an incorrect match of structure to function?

Accepted Answer

A)   sepal - protection of flower
B)   filament - produces pollen
C)   petal - attracts pollinator
D)   ovary - contains female gametophyte
E)   stigma - allows pollen to adhereF) B) and C)
G) A) and E)

Question 14

An advantage of using genetically modified plants is that they

Accepted Answer

A)   are genetically identical to the parent plant.
B)   grow much more quickly.
C)   may possess superior characteristics to the original plant.
D)   are always virus-free.
E)   cannot undergo asexual reproduction.F) None of the above
G) C) and D)

Question 15

Short-day (long-night)  plants

Accepted Answer

A)   bloom after a certain length of continuous daylight.
B)   bloom after a certain length of continuous darkness.
C)   bloom only at night.
D)   use other environmental stimuli to trigger flowering.
E)   bloom only during the day.F) A) and D)
G) C) and D)

Question 16

Which plant hormone is responsible for breaking seed dormancy?

Accepted Answer

A)   gibberellins
B)   auxins
C)   abscisic acid
D)   ethylene
E)   cytokininsF) B) and E)
G) D) and E)

Question 17

A root growing into the Earth is exhibiting negative gravitropism.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is an effect of gibberellins?

Accepted Answer

A)   increased stem length
B)   cell elongation
C)   breaking the dormancy of seeds
D)   larger fruit size
E)   All of the above are effects of gibberellins.F) A) and E)
G) B) and E)

Question 19

Plants are naturally able to reproduce asexually because they contain meristematic tissue.

Accepted Answer

A) True 
 B)False

Question 20

A plant that is dioecious is incapable of which of the following?

Accepted Answer

A)   cross-pollination
B)   double fertilization
C)   self-pollination
D)   gametophyte production
E)   pollen productionF) All of the above
G) B) and E)

Exam 21: Plant Responses and Reproduction

Which of the following is a possible use for genetically modified crops?

Correct AnswerverifiedE

The application of abscisic acid to a plant may prevent fruit maturation.

Correct AnswerverifiedShow Answer

Flowering in most plants is triggered by

Correct AnswerverifiedB

Peaches may be ripened at home by enclosing them in a paper bag. This is due to the production of which hormone?

Correct AnswerverifiedShow Answer

In order for senescence to be prevented, which hormone needs to be present in the plant?

Correct AnswerverifiedShow Answer

What is the role of auxin in regards to plant growth?

Correct AnswerverifiedA

Monocot seeds differ from eudicot seeds because in monocot seeds

Correct AnswerverifiedShow Answer

Phytochrome red (P r) differs from phytochrome far-red (P fr) in that

Correct AnswerverifiedShow Answer

Plant hormones are

Correct AnswerverifiedShow Answer

Cytokinins may help promote the growth of new plants in tissue culture.

Correct AnswerverifiedShow Answer

Which of the following events will occur if gibberellins are applied to barley?

Correct AnswerverifiedShow Answer

Ethylene stimulates fruit ripening by stimulating

Correct AnswerverifiedShow Answer

Which of the following is an incorrect match of structure to function?

Correct AnswerverifiedShow Answer

An advantage of using genetically modified plants is that they

Correct AnswerverifiedShow Answer

Short-day (long-night) plants

Correct AnswerverifiedShow Answer

Which plant hormone is responsible for breaking seed dormancy?

Correct AnswerverifiedShow Answer

A root growing into the Earth is exhibiting negative gravitropism.

Correct AnswerverifiedShow Answer

Which of the following is an effect of gibberellins?

Correct AnswerverifiedShow Answer

Plants are naturally able to reproduce asexually because they contain meristematic tissue.

Correct AnswerverifiedShow Answer

A plant that is dioecious is incapable of which of the following?

Correct AnswerverifiedShow Answer

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A

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Phytochrome red (P _r) differs from phytochrome far-red (P _fr) in that

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