Exemplar Problem and Solution
MCQs 2
Question: 10. The correct sequence of reproductive stages seen in flowering plants is
(a) Gametes, zygote, embryo, seedling
(b) Zygote, gametes, embryo, seedling
(c) Seedling, embryo, zygote, gametes
(d) Gametes, embryo, zygote, seedling
Answer: (a) Gametes, zygote, embryo, seedling
Question: 11. The number of chromosomes in parents and offsprings of a particular species remains constant due to
(a) Doubling of chromosomes after zygote formation
(b) Halving of chromosomes during gamete formation
(c) Doubling of chromosomes after gamete formation
(d) Halving of chromosomes after gamete formation
Answer: (b) Halving of chromosomes during gamete formation
Question: 12. In Rhizopus, tubular thread-like structures bearing sporangia at their tips are called
(a) Filaments
(b) Hyphae
(c) Rhizoids
(d) Roots
Answer: (b) Hyphae
Question: 13. Vegetative propagation refers to formation of new plants from
(a) Stem, roots and flowers
(b) Stem, roots and leaves
(c) Stem, flowers and fruits
(d) Stem, leaves and flowers
Answer: (b) Stem, roots and leaves
Question: 14. Factors responsible for the rapid spread of bread mould on slices of bread are
(1) Large number of spores
(2) Availability of moisture and nutrients in bread
(3) Presence of tubular branched hyphae
(4) Formation of round shaped sporangia
(a) (1) and (3)
(b) (2) and (4)
(c) (1) and (2)
(d) (3) and (4)
Answer: (c) (1) and (2)
Question: 15. Length of pollen tube depends on the distance between
(a) Pollen grain and upper surface of stigma
(b) Pollen grain on upper surface of stigma and ovule
(c) Pollen grain in anther and upper surface of stigma
(d) Upper surface of stigma and lower part of style
Answer: (c) Pollen grain in anther and upper surface of stigma
Question: 16. Which of the following statements are true for flowers?
(1) Flowers are always bisexual
(2) They are the sexual reproductive organs
(3) They are produced in all groups of plants
(4) After fertilisation they give rise to fruits
(a) (1) and (4)
(b) (2) and (3)
(c) (1) and (3)
(d) (2) and (4)
Answer: (d) (2) and (4)
Question: 17. Which among the following statements are true for unisexual flowers?
(1) They possess both stamen and pistil
(2) They possess either stamen or pistil
(3) They exhibit cross pollination
(4) Unisexual flowers possessing only stamens cannot produce fruits
(a) (1) and (4)
(b) (2), (3) and (4)
(c) (3) and (4)
(d) (1), (3) and (4)
Answer: (b) (2), (3) and (4)
Question: 18. Which among the following statements are true for sexual reproduction in flowering plants?
(1) It requires two types of gametes
(2) Fertilisation is a compulsory event
(3) It always results in formation of zygote
(4) Offspring formed are clones
(a) (1) and (4)
(b) (1), (2) and (4)
(c) (1), (2) and (3)
(d) (1), (2) and (4)
Answer: (c) (1), (2) and (3)
