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.
  • (a)
  • (b)
  • (c)
  • (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
  • (a)
  • (b)
  • (c)
  • (d)
Which one of the following statements is correct?
  • Endothecium produces the microcspores
  • Sporogenous tissue is haploid
  • Tapetum nourishes the developing pollen.
  • Hard outer layer of pollen is called intine.
Which one of the following statements is not true?
  • Tapetum helps in the dehiscence of anther
  • Pollen grains of many species cause severe allergies
  • Stored pollen in liquid nitrogen can be used in the crop breeding programmes
  • Exine of pollen grains is made up of sporopollenin
The phenomenon wherein, the ovary develops into a fruit without fertilisation is called:
  • Asexual reproduction
  • Sexual reproduction
  • Apomixis
  • Parthenocarpy
Match the column(For fertilised embryo sac)
sexual-reproduction-in-flowering-plants-mcq-1.png
  • p -> iii, q->i, r -> ii
  • p -> iii, q->ii, r -> i
  • p -> ii, q->i, r -> iii
  • p -> i, q->iii, r -> ii
Wind pollinated flowers are
  • Small, brightly coloured, producing large number of pollen grains
  • Small, producing nectar and dry pollen
  • Small, producing large number of dry pollen grains
  • 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
  • (a)
  • (b)
  • (c)
  • (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.
  • (a)
  • (b)
  • (c)
  • (d)
The coconut water and the edible part of coconut are equivalent to
  • Endosperm
  • Endocarp
  • Embryo
  • Mesocarp
Totipotency is
  • Development of a fruit from a flower in a medium
  • Development of an organ from a cell in a medium
  • Development of tissues of all kinds from a cell in a medium
  • None of the above
0 h : 0 m : 1 s

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