Question 1

All of the following are flower parts except the

Accepted Answer

A)  endosperm.
B)  calyx.
C)  corolla.
D)  stigma.
E)  stylE.F) A) and B)
G) B) and C) A

Question 2

In a long-day plant,interrupting a long night with a flash of light may trigger flowering.Conversely,if a long day is interrupted by short period of darkness,why doesn't a short-day plant flower?

Accepted Answer

A)  Sunlight contains enough far-red light to inhibit the phytochrome induction of flowering.
B)  Phytochrome degrades slowly in the dark to the inactive PR form.A brief dark period during the day is not sufficient to inactivate phytochrome.
C)  Phytochrome is only active in the dark.
D)  The circadian clock is less active during the day than at night.
E)  The cool temperatures at night interact with the phytochrome responsE.F) D) and E)
G) C) and D)

Question 3

At a certain point in the flowering process,shoots become committed to making a flower.This is called

Accepted Answer

A)  apomixes.
B)  bilateralism.
C)  phase change.
D)  competence.
E)  floral determination.F) B) and E)
G) D) and E)

Question 4

Which of the following statements about plant reproduction is incorrect?

Accepted Answer

A)  Monoecious plants can have male and female flowers on the same plant.
B)  Dioecious plants have male and female flowers on different plants.
C)  Self-pollinating angiosperms are usually adapted to specific uniform habitats.
D)  Outcrossing promotes genetic diversity.
E)  Self-pollinated plants need to be visited by pollinators sometime during the time of pollen releasE.F) A) and B)
G) None of the above

Question 5

Self-pollinated angiosperms adapted to a particular uniform habitat are likely to produce large numbers of

Accepted Answer

A)  outcrossed individuals.
B)  ill-adapted offspring.
C)  mutations.
D)  infertile offspring.
E)  uniform offspring.F) A) and B)
G) A) and C)

Question 6

Which of the following processes is not involved in determining when a plant will produce flowers?

Accepted Answer

A)  water potential
B)  temperature
C)  light
D)  promotive internal signals
E)  inhibitory internal signalsF) A) and E)
G) C) and E)

Question 7

Microspore mother cells produce microspores that develop into

Accepted Answer

A)  egg cells.
B)  pollen grains.
C)  synergids.
D)  endosperm.
E)  megaspores.F) A) and C)
G) C) and E)

Question 8

Internal developmental changes allow plants to become able to respond to external and/or internal signals.This transition is known as

Accepted Answer

A)  cloning.
B)  initiation.
C)  abscission.
D)  perennial development.
E)  phase changE.F) B) and E)
G) A) and B)

Question 9

Pollination begins when pollen is transferred from the

Accepted Answer

A)  anther to the ovary of a flower.
B)  anther to the receptacle of a flower.
C)  anther to the stigma of a flower.
D)  stigma to the embryo sac of a flower.
E)  synergid to the egg of a flower.F) A) and E)
G) A) and D) C

Question 10

Early seed plants were pollinated by ________,as are present-day conifers.

Accepted Answer

A)  beetles
B)  bees
C)  butterflies
D)  wind
E)  waterF) C) and E)
G) All of the above

Question 11

Which of the following actions will cause a plant to revert from an adult phase back to a juvenile one?

Accepted Answer

A)  induction of the LEAFY gene
B)  application of gibberellins
C)  far-red wavelengths of light
D)  removal of flowers
E)  application of abscisic acidF) B) and C)
G) A) and D)

Question 12

Endosperm tissue of angiosperms has what ploidy level?

Accepted Answer

A)  n
B)  2n
C)  3n
D)  4n
E)  8nF) B) and D)
G) D) and E)

Question 13

Which of the following statements about plant tissue culture is false?

Accepted Answer

A)  Callus tissue can form roots and shoots.
B)  Individual cells can give rise to whole plants through tissue cultures.
C)  Individual protoplasts are isolated from tissues by breaking down the cells walls with enzymes.
D)  Virus-free crop species can be propagated by culturing meristems.
E)  A callus is a mass of undifferentiated cells.F) A) and E)
G) None of the above E

Question 14

Which of the following is not an evolutionary trend in floral specialization?

Accepted Answer

A)  There has been a trend toward numerous free,spirally arranged flower parts.
B)  Separate floral parts have become fused.
C)  The number of parts in each floral whorl has been reduced from many to few.
D)  The spiral patterns of attachment of floral parts in primitive angiosperms have evolved into a single whorl at each level.
E)  The central axis of many flowers has shortened,bringing the whorls closer together.F) None of the above
G) C) and E)

Question 15

Which of these characteristics does not promote outcrossing in flowering plants?

Accepted Answer

A)  self-incompatibility
B)  dioecism
C)  monoecism
D)  physical separation of flower parts
E)  apomixisF) C) and D)
G) B) and D)

Question 16

The swollen lower portion of the carpels enclose

Accepted Answer

A)  pollen.
B)  ovules.
C)  petals.
D)  sepals.
E)  stamens.F) C) and D)
G) C) and E)

Question 17

Evolutionarily,floral parts are modified

Accepted Answer

A)  stems.
B)  leaves.
C)  roots.
D)  stolons.
E)  buds.F) A) and E)
G) A) and D)

Question 18

Pollinators may be attracted to a flower based on any of the following factors except

Accepted Answer

A)  the amount of nectar.
B)  odor.
C)  color of the flower in visible light.
D)  color of the flower in UV light.
E)  taste of the ovules.F) All of the above
G) C) and D)

Question 19

Which of these characteristics would most likely discourage self pollination in a flower with both stamens and pistils?

Accepted Answer

A)  many more stamens than pistils
B)  long stamens and short pistils
C)  long pistils and short stamens
D)  pollen released before stigma is receptive (mature) 
E)  flower is wind pollinatedF) C) and E)
G) B) and D)

Question 20

Some flowers have distinctive markings that only reflect ultraviolet wavelengths of light and therefore are invisible to humans.Which statement about ultraviolet markings is not correct?

Accepted Answer

A)  The ultraviolet markings are highly visible and attractive to bees.
B)  Carotenoid pigments are responsible for the ultraviolet markings.
C)  The ultraviolet markings often form a conspicuous central bull's eye or identify the best landing sites.
D)  The ultraviolet markings repel birds and bats from the flowers.
E)  Flowers with ultraviolet markings usually appear yellow or orange to humans.F) C) and D)
G) B) and E)

Exam 42: Plant Reproduction

All of the following are flower parts except the

Correct AnswerverifiedA

In a long-day plant,interrupting a long night with a flash of light may trigger flowering.Conversely,if a long day is interrupted by short period of darkness,why doesn't a short-day plant flower?

Correct AnswerverifiedShow Answer

At a certain point in the flowering process,shoots become committed to making a flower.This is called

Correct AnswerverifiedShow Answer

Which of the following statements about plant reproduction is incorrect?

Correct AnswerverifiedShow Answer

Self-pollinated angiosperms adapted to a particular uniform habitat are likely to produce large numbers of

Correct AnswerverifiedShow Answer

Which of the following processes is not involved in determining when a plant will produce flowers?

Correct AnswerverifiedShow Answer

Microspore mother cells produce microspores that develop into

Correct AnswerverifiedShow Answer

Internal developmental changes allow plants to become able to respond to external and/or internal signals.This transition is known as

Correct AnswerverifiedShow Answer

Pollination begins when pollen is transferred from the

Correct AnswerverifiedC

Early seed plants were pollinated by ________,as are present-day conifers.

Correct AnswerverifiedShow Answer

Which of the following actions will cause a plant to revert from an adult phase back to a juvenile one?

Correct AnswerverifiedShow Answer

Endosperm tissue of angiosperms has what ploidy level?

Correct AnswerverifiedShow Answer

Which of the following statements about plant tissue culture is false?

Correct AnswerverifiedE

Which of the following is not an evolutionary trend in floral specialization?

Correct AnswerverifiedShow Answer

Which of these characteristics does not promote outcrossing in flowering plants?

Correct AnswerverifiedShow Answer

The swollen lower portion of the carpels enclose

Correct AnswerverifiedShow Answer

Evolutionarily,floral parts are modified

Correct AnswerverifiedShow Answer

Pollinators may be attracted to a flower based on any of the following factors except

Correct AnswerverifiedShow Answer

Which of these characteristics would most likely discourage self pollination in a flower with both stamens and pistils?

Correct AnswerverifiedShow Answer

Some flowers have distinctive markings that only reflect ultraviolet wavelengths of light and therefore are invisible to humans.Which statement about ultraviolet markings is not correct?

Correct AnswerverifiedShow Answer

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E

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