Question 1

During germination, which part of the seed exhibits negative gravitrophism?

Accepted Answer

A)   embryonic shoot
B)   cotyledon
C)   seed coat
D)   root system
E)   embryoF) C) and D)
G) A) and D)

Question 2

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 B)
G) B) and D)

Question 3

Since plant sperm are nonflagellated, how do they reach the ovule from the stigma?

Accepted Answer

A)   the sperm swim in water
B)   the sperm are delivered by a pollen tube
C)   the sperm are carried on air currents
D)   the sperm delivered by insects
E)   the ovules are delivered to the stigmaF) C) and D)
G) All of the above

Question 4

Which hormone is involved in a plant dropping the lower leaves as it grows taller?

Accepted Answer

A)   cytokinins
B)   gibberellins
C)   auxin
D)   ethylene
E)   abscisic acidF) A) and B)
G) B) and E)

Question 5

During germination, which cellular structure will exhibit positive gravitrophism and grow downward?

Accepted Answer

A)   embryonic root
B)   embryonic shoot
C)   cotyledon
D)   shoot
E)   seed nucleusF) B) and C)
G) A) and E)

Question 6

The application of auxin to a seed may cause it to germinate.

Accepted Answer

A) True 
 B)False

Question 7

Plants undergo an alternation of generations. This means that the diploid _____ produces spores, which develop into the haploid _____.

Accepted Answer

A)   sporophyte; gametophyte
B)   gametophyte; sporophyte
C)   sporophyte; seeds
D)   flowers; gametophyte
E)   sporophyte; flowersF) B) and D)
G) All of the above

Question 8

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

Question 9

A flower that is bisexual contains

Accepted Answer

A)   only carpels.
B)   only stamens.
C)   extra sepals.
D)   both stamens and carpels.
E)   anthers but no filaments.F) All of the above
G) C) and E)

Question 10

Because tomatoes contain seeds they are classified as a

Accepted Answer

A)   plant.
B)   vegetable.
C)   fruit.
D)   tree.
E)   legume.F) A) and E)
G) A) and D)

Question 11

Some citizens are concerned about the use of genetically modified plants because they

Accepted Answer

A)   are better for the environment.
B)   may create herbicide-resistanct super weeds.
C)   are less nutritious than the original plant.
D)   are genetically identical.
E)   do not grow as well as the original plant.F) A) and B)
G) A) and C)

Question 12

Plants detect the presence of light using _____, whereas day length is detected using _____.

Accepted Answer

A)   auxin; gibberellin
B)   phytochrome; auxin
C)   auxin; phytochrome
D)   phytochrome; gibberellin
E)   gibberellin; auxinF) C) and D)
G) A) and B)

Question 13

Which cellular structure enables a root cell to grow downward?

Accepted Answer

A)   amyloplast
B)   chromoplast
C)   auxin
D)   chloroplast
E)   nucleusF) C) and D)
G) A) and B)

Question 14

Alternation of generations means that a diploid sporophyte produces haploid spores by meiosis, and a haploid gametophyte produces gametes by mitosis.

Accepted Answer

A) True 
 B)False

Question 15

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 so that different sides will face 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) C) and E)
G) A) and C)

Question 16

Synthetic auxins are used in agriculture to

Accepted Answer

A)   create seedless varieties of fruit.
B)   to control the growth of grasses.
C)   to speed up the growth of the plant.
D)   to encourage larger root masses.
E)   to incrase the size of the lateral buds.F) A) and D)
G) C) and D)

Question 17

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 E)
G) All of the above

Question 18

Plants with both female and male flowers on the same plant are called

Accepted Answer

A)   complete.
B)   incomplete.
C)   monoecious.
D)   dioecious.
E)   bisexual.F) All of the above
G) A) and E)

Question 19

The microspores develop into pollen grains in the

Accepted Answer

A)   anther.
B)   filament.
C)   stigma.
D)   style.
E)   ovary.F) A) and E)
G) B) and E)

Question 20

The aging process in plants is known as

Accepted Answer

A)   senescence.
B)   dormancy.
C)   abscission.
D)   apical dominance.
E)   gravitropism.F) A) and D)
G) A) and C)

Exam 21: Plant Responses and Reproduction

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

Some citizens are concerned about the use of genetically modified plants because they

Correct AnswerverifiedShow Answer

Because tomatoes contain seeds they are classified as a

Correct AnswerverifiedShow Answer

The microspores develop into pollen grains in the

Correct AnswerverifiedShow Answer

Synthetic auxins are used in agriculture to

Correct AnswerverifiedShow Answer

Which hormone is involved in a plant dropping the lower leaves as it grows taller?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Since plant sperm are nonflagellated, how do they reach the ovule from the stigma?

Correct AnswerverifiedShow Answer

Plants detect the presence of light using _____, whereas day length is detected using _____.

Correct AnswerverifiedShow Answer

A flower that is bisexual contains

Correct AnswerverifiedShow Answer

Alternation of generations means that a diploid sporophyte produces haploid spores by meiosis, and a haploid gametophyte produces gametes by mitosis.

Correct AnswerverifiedShow Answer

Which cellular structure enables a root cell to grow downward?

Correct AnswerverifiedShow Answer

During germination, which part of the seed exhibits negative gravitrophism?

Correct AnswerverifiedShow Answer

Plants undergo an alternation of generations. This means that the diploid _____ produces spores, which develop into the haploid _____.

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

The application of auxin to a seed may cause it to germinate.

Correct AnswerverifiedShow Answer

Plants with both female and male flowers on the same plant are called

Correct AnswerverifiedShow Answer

The aging process in plants is known as

Correct AnswerverifiedShow Answer

During germination, which cellular structure will exhibit positive gravitrophism and grow downward?

Correct AnswerverifiedShow Answer

When a plant is experiencing water stress,

Correct AnswerverifiedShow Answer

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Plants detect the presence of light using _, whereas day length is detected using _.

Correct Answer
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Plants undergo an alternation of generations. This means that the diploid _ produces spores, which develop into the haploid _.

Correct Answer
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