Question 1

Which of the following plant hormones promotes cell division?

Accepted Answer

A)   cytokinins
B)   auxin
C)   gibberellins
D)   abscisic acid
E)   ethyleneF) A) and B)
G) All of the above

Question 2

Plant reproduction by tissue culture differs from reproduction by meristem culture because

Accepted Answer

A)   plants produced by meristem culture are clones, whereas tissue culture does not produce genetically identical plants.
B)   tissue culture requires cells from a plant's root system, whereas any cell of a plant may be used for meristem culture.
C)   tissue culture propagation produces clonal plants, whereas meristem culture produces plants that may be genetically different.
D)   tissue culture produces plants that are virus-free, whereas plants produced by meristem culture may not be virus-free.
E)   meristem culture requires removal of the plant cell walls, whereas tissue culture does not.F) B) and D)
G) C) and E)

Question 3

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) None of the above
G) A) and E)

Question 4

Auxin causes bending in stems and roots by

Accepted Answer

A)   causing cell elongation.
B)   preventing cell elongation.
C)   breaking down cell walls.
D)   causing cell shrinkage.
E)   inhibiting lateral bud growth.F) C) and D)
G) A) and D)

Question 5

During pollen grain germination the two cells will develop into the ______ and _______.

Accepted Answer

A)   pollen tube and sperm
B)   pollen tube and egg
C)   ovule and sperm
D)   fruit and seeds
E)   pollen tube and zygoteF) A) and E)
G) C) and D) A

Question 6

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) D) and E)
G) B) and D)

Question 7

Which of the following does not represent a possible use for genetically modified crops?

Accepted Answer

A)   vaccine production
B)   improved yield
C)   herbicide resistance
D)   mass reproduction by asexual means only
E)   improved nutritional valueF) B) and C)
G) All of the above

Question 8

Which fruit is most likely to be dispersed by the wind?

Accepted Answer

A)   dandelion
B)   apples
C)   walnut
D)   cocklebur
E)   cherryF) A) and C)
G) A) and B)

Question 9

You wish to change the growth pattern of the shrubs in your yard to give them a fuller,more bushy appearance.This could be accomplished by

Accepted Answer

A)   pruning the shoot tip.
B)   pruning the lateral buds.
C)   pruning the lateral buds and applying gibberellins.
D)   applying auxin to the roots.
E)   pruning the shoot tip and applying auxin to the shoot.F) A) and B)
G) All of the above

Question 10

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 11

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

Accepted Answer

A) True 
 B)False  True

Question 12

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 will grow upwards.
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 is accelerated by promoting cell division.
E)   Cellulase is produced which will stimulate the breakdown of the cellulose in the cell walls.F) C) and D)
G) A) and C)

Question 13

A fleshy fruit is more likely to use which of the following methods of seed dispersal?

Accepted Answer

A)   eaten by animals and seeds passed through feces
B)   blown by wind
C)   stuck to fur of mammal and carried
D)   fruit bursts when mature, spreading seeds outward
E)   drop and remain near parent plantF) A) and B)
G) B) and E)

Question 14

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

Accepted Answer

A)   are better for the environment.
B)   may harm the environment.
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 C)
G) B) and C)

Question 15

Which of the following structures may be missing in a bisexual flower?

Accepted Answer

A)   carpels
B)   stamens
C)   sepals
D)   ovules
E)   anthersF) A) and E)
G) D) and E)

Question 16

Plant growth in response to an environmental stimulus is called

Accepted Answer

A)   apical dominance.
B)   a tropism.
C)   senescence.
D)   a photoperiod.
E)   dormancy.F) C) and D)
G) None of the above

Question 17

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

Accepted Answer

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

Question 18

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 B)
G) C) and D)

Question 19

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

Accepted Answer

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

Question 20

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) All of the above
G) B) and C)

Exam 21: Plant Responses and Reproduction

Which of the following plant hormones promotes cell division?

Correct AnswerverifiedShow Answer

Plant reproduction by tissue culture differs from reproduction by meristem culture because

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Auxin causes bending in stems and roots by

Correct AnswerverifiedShow Answer

During pollen grain germination the two cells will develop into the ______ and _______.

Correct AnswerverifiedA

When a plant is experiencing water stress

Correct AnswerverifiedShow Answer

Which of the following does not represent a possible use for genetically modified crops?

Correct AnswerverifiedShow Answer

Which fruit is most likely to be dispersed by the wind?

Correct AnswerverifiedShow Answer

You wish to change the growth pattern of the shrubs in your yard to give them a fuller,more bushy appearance.This could be accomplished by

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

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

Correct AnswerverifiedTrue

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

Correct AnswerverifiedShow Answer

A fleshy fruit is more likely to use which of the following methods of seed dispersal?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following structures may be missing in a bisexual flower?

Correct AnswerverifiedShow Answer

Plant growth in response to an environmental stimulus is called

Correct AnswerverifiedShow Answer

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

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 structure is used by strawberry plants during asexual reproduction?

Correct AnswerverifiedA

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

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

During pollen grain germination the two cells will develop into the and _.

Correct Answer
verified
A

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
True

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A

Correct Answer
verified