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Class 12 Biology
Sexual Reproduction In Flowering Plants
Quiz 3
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Read the assertion and reason carefully to mark the correct option out of the options given below: (a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false Assertion: Primary endosperm nucleus (PEN) is generally triploid. Reason: PEN is derived by the fusion of haploid male gametes and diploid secondary nucleus.
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(a)
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(b)
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(c)
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(d)
Read the assertion and reason carefully to mark the correct option out of the options given below: (a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false Assertion: Polyembryony is found in all angiosperm. Reason: All angiosperm are produced by apomixis
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(a)
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(b)
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(c)
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(d)
Which one of the following statements is correct?
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Endothecium produces the microcspores
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Sporogenous tissue is haploid
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Tapetum nourishes the developing pollen.
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Hard outer layer of pollen is called intine.
Which one of the following statements is not true?
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Tapetum helps in the dehiscence of anther
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Pollen grains of many species cause severe allergies
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Stored pollen in liquid nitrogen can be used in the crop breeding programmes
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Exine of pollen grains is made up of sporopollenin
The phenomenon wherein, the ovary develops into a fruit without fertilisation is called:
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Asexual reproduction
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Sexual reproduction
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Apomixis
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Parthenocarpy
Match the column(For fertilised embryo sac)
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p -> iii, q->i, r -> ii
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p -> iii, q->ii, r -> i
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p -> ii, q->i, r -> iii
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p -> i, q->iii, r -> ii
Wind pollinated flowers are
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Small, brightly coloured, producing large number of pollen grains
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Small, producing nectar and dry pollen
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Small, producing large number of dry pollen grains
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Large, producing abundant nectar and pollen
Read the assertion and reason carefully to mark the correct option out of the options given below: (a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false Assertion : Cross-pollination results in healthy and viable offspring's. Reason : In self-pollination, there is production of weaker progeny
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(a)
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(b)
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(c)
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(d)
Read the assertion and reason carefully to mark the correct option out of the options given below: (a) If both the assertion and the reason are true and the reason is a correct explanation of the assertion. (b) If both the assertion and reason are true but the reason is not a correct explanation of the assertion. (c) If the assertion is true but the reason is false. (d) If both the assertion and reason are false Assertion: In apomixis, plants of new genetic sequences are produced. Reason : In apomixis, individuals of same genetic sequences meet.
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(a)
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(b)
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(c)
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(d)
The coconut water and the edible part of coconut are equivalent to
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Endosperm
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Endocarp
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Embryo
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Mesocarp
Totipotency is
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Development of a fruit from a flower in a medium
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Development of an organ from a cell in a medium
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Development of tissues of all kinds from a cell in a medium
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None of the above
Explanation
Development of tissues of all kinds from a cell in a medium
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