Class 12 Sexual Reproductions in Flowering Plants MCQs

Free PDF Download of CBSE Biology Multiple Choice Questions for Class 12 with Answers Chapter 2 Sexual Reproduction in Flowering Plants. Class 12 Sexual Reproductions in Flowering Plants MCQs PDF Download was Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 12 Biology Sexual Reproduction in Flowering Plants MCQs PDF with Answers to know their preparation level.

Class 12 Biology Sexual Reproductions in Flowering Plants MCQs with Answer

Q1. The phenomenon observed in some plants wherein parts of the sexual apparatus is used for forming embryos
without fertilisation is called:

1. Parthenocarpy.
2. Apomixis.
3. Vegetative propagation.
4. Sexual reproduction.

Q2. The number of meiotic divisions, required to produce 400 seeds in a pea plant, is:

1. 100
2. 200
3. 400
4. 500

Q3. A particular species of plant produces light, non-sticky pollen in large numbers and its stigmas are long and
feathery. These modifications facilitate pollination by:

1. Insects.
2. Water.
3. Wind.
4. Animals.

Q4. In a typical complete, bisexual and hypogynous flower the arrangement of floral whorls on the thalamus from the
outermost to the innermost is:

1. Calyx, corolla, androecium and gynoecium.
2. Calyx, corolla, gynoecium and androecium.
3. Gynoecium, androecium, corolla and calyx.
4. Androecium, gynoecium, corolla and calyx.

Q5. The outermost and innermost wall layers of microsporangium in an anther are respectively:

1. Endothecium and tapetum.
2. Epidermis and endodermis.
3. Epidermis and middle layer.
4. Epidermis and tapetum.

Q6. From among the situations given below, choose the one that prevents both autogamy and geitonogamy:

1. Monoecious plant bearing unisexual flowers.
2. Dioecious plant bearing only male or female flowers.
3. Monoecious plant with bisexual flowers.
4. Dioecious plant with bisexual flowers.

Q7. From among the sets of terms given below, identify those that are associated with the gynoecium.

1. Stigma, ovule, embryo sac, placenta.
2. Thalamus, pistil, style, ovule.
3. Ovule, ovary, embryo sac, tapetum.
4. Ovule, stamen, ovary, embryo sac.

Q8. The phenomenon wherein, the ovary develops into a fruit without fertilisation is called:

1. Parthenocarpy.
2. Apomixis.
3. Asexual reproduction.
4. Sexual reproduction.

Q9. While planning for an artificial hybridization programme involving dioecious plants, which of the following steps
would not be relevant:

1. Bagging of female flower.
2. Dusting of pollen on stigma.
3. Emasculation.
4. Collection of pollen.

Q10. 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?

1. Diploid.
2. Triploid.
3. Tetraploid.
4. Pentaploid.

Q11. Choose the correct statement from the following:

1. Cleistogamous flowers always exhibit autogamy.
2. Chasmogamous flowers always exhibit geitonogamy.
3. Cleistogamous flowers exhibit both autogamy and geitonogamy.
4. Chasmogamous flowers never exhibit autogamy.

Q12. How many microspore mother cells are required to produce 1000 microspores/ pollen grains?

1. 100
2. 150
3. 200
4. 250

Q13. Which of the following floral parts forms the pericarp after fertilisation?

1. Nucellus.
2. Outer integument.
3. Ovary wall.
4. Inner integument

Q14. Embryo sac is to ovule as _ is to an anther.

1. Stamen.
2. Filament.
3. Pollen grain.
4. Androecium.

Q15. In a fertilised embryo sac, the haploid, diploid and triploid structures are:

1. Synergid, zygote and primary endosperm nucleus.
2. Synergid, antipodal and polar nuclei.
3. Antipodal, synergid and primary endosperm nucleus.
4. Synergid, polar nuclei and zygote.

Q16. The entry of pollen tube into ovule through the micropyle is called:

1. Porogamy.
2. Chalazogamy.
3. Mesogamy.
4. Isogamy.

Q17. During microsporogenesis, meiosis occurs in:

1. Endothecium.
2. Microspore mother cells.
3. Microspore tetrads.
4. Pollen grains.

Q18. During microsporogenesis, meiosis occurs in:

1. Endothecium.
2. Microspore mother cells.
3. Microspore tetrads.
4. Pollen grains.

Q19. In a flower, if the megaspore mother cell forms megaspores without undergoing meiosis and if one of the
megaspores develops into an embryo sac, its nuclei would be:

1. Haploid.
2. Diploid.
3. A few haploid and a few diploid.
4. With varying ploidy.

Q20. Starting from the innermost part, the correct sequence of parts in an ovule are:

1. Egg, nucellus, embryo sac, integument.
2. Egg, embryo sac, nucellus, integument.
3. Embryo sac, nucellus, integument, egg.
4. Egg, integument, embryo sac, nucellus.

Q21. Which of the following represents the female gametophyte in angiosperms?

1. Embryo.
2. Embryo sac.
3. Synergid
4. Endosperm.

Q22. In following plants, the unisexual female flower is:

1. Pistillate.
2. Homothallic.
3. Monoecious.
4. Staminate.

Q23. Select the wrong one:

1. In dioecious plant, male and female flowers are seen in different plants.
2. Cockroach is unisexual.
3. Tapeworm, leech, earthworm and sponges are hermaphrodites.
4. Marchantia and chara are dioecious.

Q24. When the pollen of a flower is transferred to the stigma of another flower on the same plant, the process is
known as:

1. Autogamy.
2. Geitonogamy.
3. Xenogamy.
4. Cleistogamy.

Q25. A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above
situation is:

1. Plant is dioecious and bears only pistillate flowers.
2. Plant is dioecious and bears both pistillate and staminate flowers.
3. Plant is monoecious.
4. Plant is dioecious and bears only staminate flowers.

Q26. Which part of the embroyo sac receive the male gamete?

1. Egg.
2. Antipodals.
3. PEN.
4. Synergid.