Question 1

When a plant is experiencing water stress,

Accepted Answer

A)   auxin will shut down vessel elements.
B)   gibberellins will stimulate growth of root hairs.
C)   abscisic acid will stimulate closure of stomata.
D)   ethylene will increase water flow in vessel elements.
E)   cytokinins will stimulate elongation of stems and growth of new leaves.F) A) and B)
G) A) and E)

Question 2

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) A) and B)
G) B) and E)

Question 3

Plant hormones are

Accepted Answer

A)   receptor proteins.
B)   chemical signaling molecules.
C)   produced only in the apical meristem.
D)   produced both in the apical meristem and the vascular cambium.
E)   proteins.F) None of the above
G) B) and E)

Question 4

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 D)
G) B) and E)

Question 5

Which of the following structures is used by strawberry plants during asexual reproduction?

Accepted Answer

A)   stolon
B)   rhizome
C)   tuber
D)   corm
E)   ovaryF) A) and B)
G) A) and C)

Question 6

Phytochrome red Pr)  differs from phytochrome far-red Pfr)  in that

Accepted Answer

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

Question 7

A long-day short-night)  plant would most likely bloom only

Accepted Answer

A)   in the fall.
B)   in the spring.
C)   in the summer.
D)   at night.
E)   during the day.F) C) and D)
G) B) and D)

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Which of the following is not a function of the flower in an angiosperm?

Accepted Answer

A)   producing fruit
B)   protection of the gametophyte
C)   attracting pollinators
D)   producing spores
E)   supporting the plantF) A) and E)
G) B) and E)

Question 10

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 E)
G) A) and D)

Question 11

Auxin produced by which portion of the plant is responsible for the development of fruit?

Accepted Answer

A)   apical meristem
B)   seeds
C)   vascular cambium
D)   root
E)   lateral budF) All of the above
G) A) and E)

Question 12

A nursery wishes to produce a large number of carrot plants for sale in the spring. The nursery will most likely use which technique?

Accepted Answer

A)   tissue culture
B)   hybridization
C)   cuttings
D)   anther culture
E)   meristem cultureF) A) and D)
G) A) and C)

Question 13

A winter bud begins winter with an amount of abscisic acid to maintain dormancy. Dormancy is broken in the spring because of an)

Accepted Answer

A)   gradual reduction in abscisic acid over winter.
B)   increase of abscisic acid production by the meristem within the bud.
C)   increase in cytokinin in the leaves.
D)   gradual reduction of auxin in the shoot tip.
E)   gradual increase in ethylene production by the meristem within the bud.F) A) and D)
G) C) and E)

Question 14

An incomplete flower may lack a carpel.

Accepted Answer

A) True 
 B)False

Question 15

Which plant hormone is responsible for breaking the dormancy cycle in plants?

Accepted Answer

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

Question 16

A monocot seed consists of a seed coat, two cotyledons, an embryo, and an endosperm.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following pharmaceutical products can be produced by genetically modified plants?

Accepted Answer

A)   antigens
B)   antibodies
C)   hormones
D)   therapeutic proteins
E)   All of these are produced by plants.F) A) and D)
G) None of the above

Question 18

A friend complains that all of her houseplants have bent stems. You examine the plants and find that their stems all curve toward the light. What would you recommend to your friend to correct the problem?

Accepted Answer

A)   Turn each plant occasionally toward the light.
B)   Apply an auxin to the shady side of the stems.
C)   Water the plants more frequently.
D)   Apply gibberellins to the bases of the stems.
E)   Repot the plants.F) A) and C)
G) A) and B)

Question 19

Gametophytes of flowering plants are produced within the flower.

Accepted Answer

A) True 
 B)False

Question 20

A gardener wants to stimulate branching but keep the apical meristem intact so that the plants will also grow in height. What hormone should be applied?

Accepted Answer

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

Exam 21: Plant Responses and Reproduction

Which of the following structures is used by strawberry plants during asexual reproduction?

Correct AnswerverifiedShow Answer

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

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Gametophytes of flowering plants are produced within the flower.

Correct AnswerverifiedShow Answer

A friend complains that all of her houseplants have bent stems. You examine the plants and find that their stems all curve toward the light. What would you recommend to your friend to correct the problem?

Correct AnswerverifiedShow Answer

A long-day short-night) plant would most likely bloom only

Correct AnswerverifiedShow Answer

Auxin produced by which portion of the plant is responsible for the development of fruit?

Correct AnswerverifiedShow Answer

Which of the following pharmaceutical products can be produced by genetically modified plants?

Correct AnswerverifiedShow Answer

Short-day long-night) plants

Correct AnswerverifiedShow Answer

Which plant hormone is responsible for breaking the dormancy cycle in plants?

Correct AnswerverifiedShow Answer

Phytochrome red Pr) differs from phytochrome far-red Pfr) in that

Correct AnswerverifiedShow Answer

A nursery wishes to produce a large number of carrot plants for sale in the spring. The nursery will most likely use which technique?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A gardener wants to stimulate branching but keep the apical meristem intact so that the plants will also grow in height. What hormone should be applied?

Correct AnswerverifiedShow Answer

An incomplete flower may lack a carpel.

Correct AnswerverifiedShow Answer

Plant hormones are

Correct AnswerverifiedShow Answer

A winter bud begins winter with an amount of abscisic acid to maintain dormancy. Dormancy is broken in the spring because of an)

Correct AnswerverifiedShow Answer

When a plant is experiencing water stress,

Correct AnswerverifiedShow Answer

Which of the following is not a function of the flower in an angiosperm?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

A monocot seed consists of a seed coat, two cotyledons, an embryo, and an endosperm.

Correct AnswerverifiedShow Answer

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Phytochrome red P_r) differs from phytochrome far-red P_fr) in that

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