Question 1

The HOBBIT gene in an embryo helps to control the development of what structure?

Accepted Answer

A)  cotyledon
B)  endosperm
C)  root
D)  epicotyl
E)  root hairF) C) and D)
G) B) and C)

Question 2

At the Beautiful Mutants Flower Shop,a variety of unique mutant plants are sold.What would be the best flower to give to a friend who is allergic to pollen?

Accepted Answer

A)  "Superhunk" -- a plant with a mutation in the class A genes.
B)  "Beautiful Innocence" -- a plant with a mutation in the class C genes.
C)  "Clockface" -- a plant with a mutation in the CYCLOIDEA gene.
D)  "Suspense" -- a plant with a mutation in the LEAFY gene.E) B) and C)
F) All of the above

Question 3

Which of the following events is not a characteristic of successful seed germination?

Accepted Answer

A)  The radicle breaks through the seed coat.
B)  The shoot becomes photosynthetic.
C)  The embryo becomes desiccated.
D)  New growth occurs at the meristems.
E)  The seedling orients itself relative to gravity.F) A) and D)
G) A) and E)

Question 4

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

Accepted Answer

A)  Virus-free crop species can be propagated by culturing meristems.
B)  Individual cells can give rise to whole plants through tissue cultures.
C)  Synthetic hormones can be used to selectively promote root or shoot formation.
D)  Callus tissue can only form roots,not shoots.
E)  A callus is a mass of undifferentiated cells.F) A) and B)
G) None of the above D

Question 5

Browsing through a seed catalog,you are tempted to order several beautiful floral varieties,but worry that you will spend too much on your garden every year.Which plants should you buy?

Accepted Answer

A)  herbaceous perennials,which will come back year after year
B)  woody perennials,which require little space and few resources
C)  annuals,which will come back year after year
D)  biennials,which will last twenty years before they dieE) All of the above
F) A) and D)

Question 6

In a wind-pollinated species,which of these floral parts is likely to be inconspicuous or absent?

Accepted Answer

A)  receptacle
B)  stamens
C)  pistils
D)  petals
E)  stigmasF) B) and E)
G) B) and D)

Question 7

Stratification refers to the extended exposure to ________ that is required for some seeds to germinate.

Accepted Answer

A)  long wavelengths of light
B)  low temperatures
C)  high relative humidity
D)  short daylengths
E)  clay soil particlesF) C) and D)
G) All of the above

Question 8

Which step is not involved in the fertilization of angiosperm flowers?

Accepted Answer

A)  Pollen is transported to a stigma of a flower.
B)  When pollen reaches the stigma of a flower,it begins to grow a pollen tube that pierces the style.
C)  The style of the pistil contracts to bring the sperm closer to the embryo sac.
D)  The pollen tube grows until it reaches the ovule in the ovary.
E)  Double fertilization produces an embryo and the endosperm.F) B) and D)
G) B) and C)

Question 9

Ovules develop within the ovary,which is located in the swollen lower portion of which floral organ?

Accepted Answer

A)  anther
B)  stamen
C)  filament
D)  stigma
E)  pistilF) A) and B)
G) C) and D)

Question 10

Which part of the seed produces hydrolytic enzymes that break down the starchy endosperm during seed germination?

Accepted Answer

A)  scutellum
B)  amyloplasts
C)  aleurone layer
D)  plumule
E)  coleorhizaF) None of the above
G) A) and B)

Question 11

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

Accepted Answer

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

Question 12

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 pistils and short stamens
C)  long stamens and short pistils
D)  wind pollination
E)  determinant plantsF) A) and E)
G) C) and E)

Question 13

In the ABC model of floral determination,a different combination of the three genes specifies each floral organ.Which gene works in combination with the other two?

Accepted Answer

A)  A
B)  B
C)  C
D)  florigen
E)  ethyleneF) A) and E)
G) None of the above

Question 14

What is the best description of double fertilization in angiosperms?

Accepted Answer

A)  One sperm fertilizes the egg,which develops into the embryo; the other sperm fertilizes the ovary,which becomes the fruit.
B)  One sperm fertilizes the egg,which develops into the embryo; the other sperm fertilizes the polar nuclei,which forms the endosperm.
C)  One sperm fertilizes the egg,which develops into the embryo; the other sperm fertilizes the polar nuclei,which forms the seed coat.
D)  One sperm fertilizes the egg,which develops into the embryo; the other sperm produces the pollen tube.
E)  One pollen grain fertilizes the embryo sac; the other sperm fertilizes the pollen grain.F) A) and B)
G) A) and C)

Question 15

Thanks to a novel recessive mutation,a certain plant species has begun to invade colder Arctic regions outside of its normal range.However,this cold-tolerant mutation has not yet become fixed in the population.A second mutation arises that promotes self-pollination.Do you predict that the self-pollination allele will be selected for in the Arctic regions? Why or why not?

Accepted Answer

A)  Yes.The self-pollinated plant is more likely to maintain the cold-tolerant mutation,and plants in the Arctic are unlikely to be visited by pollinators.
B)  No.Outcrossing is always beneficial,since it enhances genetic diversity.
C)  No.Plants that produce flowers must be cross-pollinated for proper seed development.
D)  Cannot make a prediction from the information given.It depends on whether the plant is normally insect-pollinated or wind-pollinated.E) A) and C)
F) A) and D)

Question 16

What are plants that flower only once before they die,normally after two seasons of growth,called?

Accepted Answer

A)  annuals
B)  biennials
C)  perennials
D)  monocots
E)  dicotsF) A) and D)
G) C) and E) B

Question 17

Which structure can still develop normally in an embryo with mutations in both the SHOOTMERISTEMLESS (stm) gene and the HOBBIT gene?

Accepted Answer

A)  root cap
B)  shoot apical meristem
C)  root apical meristem
D)  leaf primordia
E)  cotyledonsF) C) and D)
G) B) and D)

Question 18

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

Accepted Answer

A)  The ultraviolet patterns are highly visible and attractive to bees.
B)  Carotenoid pigments are responsible for the ultraviolet patterns.
C)  The ultraviolet patterns often form a conspicuous central bull's eye or identify the best landing sites.
D)  The ultraviolet patterns repel birds and bats from the flowers.
E)  Flowers with ultraviolet patterns usually appear yellow or orange to humans.F) None of the above
G) C) and D)

Question 19

Which of the following is not a floral structure?

Accepted Answer

A)  endosperm
B)  calyx
C)  corolla
D)  stigma
E)  styleF) A) and E)
G) C) and E)

Question 20

Flowering can be regulated by light,temperature,gibberellin levels,or internal factors.What do all of these different flowering pathways have in common?

Accepted Answer

A)  All four pathways result in a decrease in LEAFY (LFY) expression,which induces flowering.
B)  All four pathways result in an increase in CONSTANS (CO) expression,which induces flowering.
C)  All four pathways result in an increase in LEAFY (LFY) expression,which induces flowering.
D)  All four pathways result in a decrease in CONSTANS (CO) expression,which induces flowering.E) A) and B)
F) A) and C) C

Exam 40: Plant Reproduction

The HOBBIT gene in an embryo helps to control the development of what structure?

Correct Answer
verified

At the Beautiful Mutants Flower Shop,a variety of unique mutant plants are sold.What would be the best flower to give to a friend who is allergic to pollen?

Correct Answer
verified

Which of the following events is not a characteristic of successful seed germination?

Correct Answer
verified

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

Correct Answer
verified
D

Browsing through a seed catalog,you are tempted to order several beautiful floral varieties,but worry that you will spend too much on your garden every year.Which plants should you buy?

Correct Answer
verified

In a wind-pollinated species,which of these floral parts is likely to be inconspicuous or absent?

Correct Answer
verified

Stratification refers to the extended exposure to ________ that is required for some seeds to germinate.

Correct Answer
verified

Which step is not involved in the fertilization of angiosperm flowers?

Correct Answer
verified

Ovules develop within the ovary,which is located in the swollen lower portion of which floral organ?

Correct Answer
verified

Which part of the seed produces hydrolytic enzymes that break down the starchy endosperm during seed germination?

Correct Answer
verified

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

Correct Answer
verified

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

Correct Answer
verified

In the ABC model of floral determination,a different combination of the three genes specifies each floral organ.Which gene works in combination with the other two?

Correct Answer
verified

What is the best description of double fertilization in angiosperms?

Correct Answer
verified

Correct Answer
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What are plants that flower only once before they die,normally after two seasons of growth,called?

Correct Answer
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B

Which structure can still develop normally in an embryo with mutations in both the SHOOTMERISTEMLESS (stm) gene and the HOBBIT gene?

Correct Answer
verified

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

Correct Answer
verified

Which of the following is not a floral structure?

Correct Answer
verified

Flowering can be regulated by light,temperature,gibberellin levels,or internal factors.What do all of these different flowering pathways have in common?

Correct Answer
verified
C

Exam 40: Plant Reproduction

The HOBBIT gene in an embryo helps to control the development of what structure?

Correct AnswerverifiedShow Answer

At the Beautiful Mutants Flower Shop,a variety of unique mutant plants are sold.What would be the best flower to give to a friend who is allergic to pollen?

Correct AnswerverifiedShow Answer

Which of the following events is not a characteristic of successful seed germination?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedD

Browsing through a seed catalog,you are tempted to order several beautiful floral varieties,but worry that you will spend too much on your garden every year.Which plants should you buy?

Correct AnswerverifiedShow Answer

In a wind-pollinated species,which of these floral parts is likely to be inconspicuous or absent?

Correct AnswerverifiedShow Answer

Stratification refers to the extended exposure to ________ that is required for some seeds to germinate.

Correct AnswerverifiedShow Answer

Which step is not involved in the fertilization of angiosperm flowers?

Correct AnswerverifiedShow Answer

Ovules develop within the ovary,which is located in the swollen lower portion of which floral organ?

Correct AnswerverifiedShow Answer

Which part of the seed produces hydrolytic enzymes that break down the starchy endosperm during seed germination?

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

Correct AnswerverifiedShow Answer

In the ABC model of floral determination,a different combination of the three genes specifies each floral organ.Which gene works in combination with the other two?

Correct AnswerverifiedShow Answer

What is the best description of double fertilization in angiosperms?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

What are plants that flower only once before they die,normally after two seasons of growth,called?

Correct AnswerverifiedB

Which structure can still develop normally in an embryo with mutations in both the SHOOTMERISTEMLESS (stm) gene and the HOBBIT gene?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following is not a floral structure?

Correct AnswerverifiedShow Answer

Flowering can be regulated by light,temperature,gibberellin levels,or internal factors.What do all of these different flowering pathways have in common?

Correct AnswerverifiedC

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D

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B

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C