CBSE Class 12 Biology Sexual Reproduction in Flowering Plants MCQs Set B

Question. Number of meiotic divisions required to produce 200/400 seeds of pea would be
(a) 200/400
(b) 400/800
(c) 300/600
(d) 250/500.

Answer : D

Question. In angiosperm, the endosperm is
(a) diploid
(b) triploid
(c) haploid
(d) polyploid

Answer : B

Question. In majority of angiosperms,
(a) egg has a filiform apparatus
(b) there are numerous antipodal cells
(c) reduction division occurs in the megaspore mother cells
(d) a small central cell is present in that embryo sac.

Answer : C

Question. What does the filiform apparatus do at the entrance into ovule?
(a) It brings about opening of the pollen tube.
(b) It guides pollen tube from a synergid to egg.
(c) It helps in the entry of pollen tube into a synergid.
(d) It prevents entry of more than one pollen tube into the embryo sac.

Answer : B

Question. The portion of embryonal axis between plumule (future shoot) and cotyledons is called
(a) hypocotyl
(b) epicotyl
(c) coleorhiza
(d) coleoptile.

Answer : B

Question. In water hyacinth and water lily, pollination takes place by
(a) insects or wind
(b) water currents only
(c) wind and water
(d) insects and water.

Answer : A

Question. Double fertilisation was first discovered in 1898 by _______ in Fritillaria and Lilium.
(a) Nawaschin
(b) Strasburger
(c) Amici
(d) Focke

Answer : A

Question. Nucellar polyembryony is reported in species of
(a) Citrus
(b) Gossypium
(c) Triticum
(d) Brassica.

Answer : A

Question. Proximal end of the filament of stamen is attached to the
(a) placenta
(b) thalamus or petal
(c) anther
(d) connective.

Answer : B

Question. Persistent nucellus in the seed is known as
(a) tegmen
(b) chalaza
(c) perisperm
(d) hilum.

Answer : C

Question. Filiform apparatus is a characteristic feature of
(a) suspensor
(b) egg
(c) synergid
(d) zygote

Answer : C

Question. Advantage of cleistogamy is
(a) no dependence on pollinators
(b) vivipary
(c) higher genetic variability
(d) more vigorous offspring.

Answer : A

Question. In a cereal grain the single cotyledon of embryo is represented by
(a) coleoptile
(b) coleorhiza
(c) scutellum
(d) prophyll.

Answer : C

Question. Which one of the following statements is not true?
(a) The flowers pollinated by flies and bats secrete foul odour to attract them.
(b) Honey is made by bees by digesting pollen collected from flowers.
(c) Pollen grains are rich in nutrients and they are used in the form of tablets and syrups.
(d) Pollen grains of some plants cause severe allergies and bronchial afflictions in some people.

Answer : B

Question. Female gametophyte of angiosperms is represented by
(a) ovule
(b) megaspore mother cell
(c) embryo sac
(d) nucellus.

Answer : C

Question. Male gametophyte of angiosperms is shed at
(a) four celled pollen grain
(b) three celled pollen grain
(c) microspore mother cell
(d) anther.

Answer : B

Question. The female gametophyte of a typical dicot at the time of fertilisation is
(a) 8 – celled
(b) 7 – celled
(c) 6 – celled
(d) 5 – celled

Answer : B

Question. From among the sets of terms given below, identify those that are associated with the gynoecium.
(a) Stigma, ovule, embryo sac, placenta
(b) Thalamus, pistil, style, ovule
(c) Ovule, ovary, embryo sac, tapetum
(d) Ovule, stamen, ovary, embryo sac

Answer : A

Question. The polyembryony commonly occurs in
(a) tomato
(b) potato
(c) Citrus
(d) turmeric.

Answer : C

Question. Functional megaspore in an angiosperm develops into an
(a) endosperm
(b) embryo sac
(c) embryo
(d) ovule.

Answer : B

Question. One of the most resistant biological material present in the exine of pollen grain is
(a) pectocellulose
(b) sporopollenin
(c) suberin
(d) cellulose.

Answer : B

Question. Megasporangium is equivalent to
(a) nucellus
(b) ovule
(c) embryo sac
(d) fruit.

Answer : B