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Sexual reproduction in flowering plants is an important chapter in Class 12 Biology. It is frequently tested in CBSE exams, and preparing through multiple-choice questions (MCQs) is an effective way to boost your exam performance. In this section, we offer a comprehensive set of MCQs that cover the key concepts of sexual reproduction in flowering plants, as outlined in the NCERT textbook for Class 12. These MCQs are designed to help students familiarize themselves with the exam pattern and improve their understanding of the subject matter. Download the free PDF to prepare effectively for your exams and secure top marks in this crucial chapter.
1. How many microspore mother cells are required to produce 1000 microspores/pollen grains?
(a) 100
(b) 150
(c) 200
(d) 250
Answer: (d) 250
2. Which of the following represents the female gametophyte in angiosperms?
(a) Embryo
(b) Embryo sac
(c) Synergid
(d) Endosperm
Answer: (b) Embryo sac
3. In a breeding experiment, the selected male parent is diploid and the female parent is tetraploid. What will be the ploidy level of the endosperm that will develop after double fertilisation?
(a) Diploid
(b) Triploid
(c) Tetraploid
(d) Pentaploid
Answer: (d) Pentaploid
4. The development of fruits without fertilisation of the ovary, is called
(a) Parthenogenesis
(b) Parthenocarpy
(c) Agamospermy
(d) Apomixis
Answer: (b) Parthenocarpy
5. When the pollen of a flower is transferred to the stigma of another flower on the same plant, the process is known as
(a) Autogamy
(b) Geitonogamy
(c) Xenogamy
(d) Cleistogamy
Answer: (b) Geitonogamy
6. The number of meiotic divisions, required to produce 400 seeds in a pea plant, is
(a) 100
(b) 200
(c) 300
(d) 500
Answer: (d) 500
7. What is the function of filiform apparatus in an angiospermic embryo sac?
(a) Brings about opening of the pollen tube
(b) Guides the pollen tube into a synergid
(c) Prevents entry of more than one pollen tube into a synergid
(d) None of these
Answer: (b) Guides the pollen tube into a synergid
8. 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)7 – celled
9. Polygonum type of embryo sac is
(a) 8 – nucleate, 7 – celled
(b) 8 – nucleate, 8 – celled
(c) 7 – nucleate, 7 – celled
(d) 4 – nucleate, 3 – celled
Answer: (a)8 – nucleate, 7 – celled
10. Both chasmogamous and cleistogamous flowers are present in
(a) Helianthus
(b) Commelina
(c) Rosa
(d) Gossypium
Answer: (b)Commelina
11. Even in absence of pollinating agents seed-setting is assured in
(a) Commelina
(b) Zostera
(c) Salvia
(d) Fig
Answer: (a)Commelina
12. Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in
(a) papaya
(b) bottle gourd
(c) maize
(d) all of these.
Answer: (a)papaya
13. Feathery stigma occurs in
(a) pea
(b) wheat
(c) Datura
(d) Caesalpinia
Answer: (b)wheat
14. Feathery stigma occurs in
(a) bees
(b) butterflies
(c) birds
(d) wind
Answer: (d)wind
15. Which of the following is not a water pollinated plant ?
(a) Zostera
(b) Vallisneria
(c) Hydrilla
(d) wind
Answer: (d)wind
16. Spiny or sticky pollen grains and large, attractively coloured flowers are associated with
(a) hydrophily
(b) entomophily
(c) ornithophily
(d) anemophily
Answer: (b)entomophily
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