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Pollen grains are formed in the anther of the flower by which sequence of events?


A) Diploid microspore mother cells divide by meiosis to form four haploid microspores.Each microspore develops into a pollen grain by mitosis.
B) Haploid microspore mother cells divide by meiosis to form four diploid microspores.Each microspore develops into a pollen grain by mitosis.
C) Diploid microspore mother cells divide by mitosis to form four haploid microspores.Each microspore develops into a pollen grain by meiosis.
D) Haploid microspore mother cells divide by mitosis to form four diploid microspores.Each microspore develops into a pollen grain by meiosis.
E) Diploid megaspore mother cells divide by mitosis to form four diploid megaspores.Each megaspore develops into a pollen grain by meiosis.

F) C) and D)
G) A) and B)

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In the ABC model of floral organ identity genes,different combinations of the three genes specify the following different floral organs,except for the


A) petals.
B) stamens.
C) receptacle.
D) sepals.
E) carpels.

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

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Plants that reproduce asexually might produce identical progeny from all of the following except


A) portions of roots.
B) portions of stem.
C) portions of leaves.
D) pollen grains.
E) portions of ovules.

F) None of the above
G) C) and E)

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


A) annuals.
B) biennials.
C) perennials.
D) monocots.
E) dicots.

F) C) and E)
G) A) and E)

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The gynoecium contains a slender style with a pollen-receptive _____________ at its apex.


A) anther
B) stamen
C) filament
D) stigma
E) pistil

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

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The egg of an angiosperm is located in the


A) style.
B) endosperm.
C) anther.
D) embryo sac.
E) stigma.

F) A) and E)
G) A) and D)

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The corolla is the collective term for the


A) anthers.
B) carpels.
C) petals.
D) pollen.
E) sepals.

F) A) and D)
G) D) and E)

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Ovules are produced in the ovary that is located in the swollen lower portion of the


A) anther.
B) stamen.
C) filament.
D) stigma.
E) pistil.

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

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Which of these is not part of a seed?


A) endosperm
B) embryo
C) diploid cells
D) seed coat
E) fruit

F) A) and B)
G) A) and C)

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The progression that leads to the death of a plant is known as


A) outcrossing.
B) dichogamy.
C) abscission.
D) perennial.
E) senescencE.

F) A) and B)
G) D) and E)

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Which of these methods does not help promote outcrossing in plants?


A) Staminate flowers and pistillate flowers reach maturity at different times.
B) Genetic self-incompatibility,even when staminate flowers and pistillate flowers reach maturity at the same time.
C) Flowers in which stamens and stigmas do not come in contact with each other.
D) Staminate and pistillate flowers mature at the same time,and are able to undergo self-pollination.
E) Physical separation of the staminate and pistillate flowers.

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

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The androecium is considered a specialized organ that bears the


A) microsporangia of angiosperms.
B) megasporangia of angiosperms.
C) sporangia of angiosperms.
D) eggs of angiosperms.
E) flowering hormones of angiosperms.

F) A) and E)
G) C) and D)

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The calyx is a collective term for the


A) pistils.
B) ovules.
C) petals.
D) sepals.
E) stamens.

F) A) and E)
G) A) and C)

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Another name for a light-dependent flowering pathway is


A) autonomy.
B) phototropism.
C) photoperiodism.
D) competence.
E) vernalization.

F) C) and D)
G) B) and C)

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Which of these common "vegetables" should technically be called a "fruit"?


A) potato
B) carrot
C) lettuce
D) string beans
E) celery

F) All of the above
G) A) and E)

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In much of North and South America,if a plant produces bright red flowers with little odor,it is reasonable to assume that it is pollinated by


A) bees.
B) butterflies.
C) hummingbirds.
D) moths.
E) ants.

F) A) and E)
G) B) and D)

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The formation of the endosperm and the embryo in angiosperms is the result of


A) alternation of generations.
B) outcrossing.
C) determinate growth.
D) double fertilization.
E) secondary growth.

F) None of the above
G) A) and C)

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