Sexual Reproduction in Flowering Plants MCQ Questions for Class 12 Biology Chapter 2 with Answers

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NCERT MCQ Chapters for Class 12 Biology


Q1. Maize is:

(A) Hygrophilous
(B) Anemophilus
(C) Cleistogamous
(D) Entomophilous


(B) Anemophilus


Q2. Even in absence of pollinating agents seed-setting is assured in

(A) Commelina
(B) Zostera
(C) Salvia
(D) Fig


(A) Commelina


Q3. In Capsella the endosperm in generally:

(A) Haploid
(B) Diploid
(C) Triploid
(D) Tetraploid


(C) Triploid


Q4. Unisexuality of flowers prevents

(A) Autogamy, but not geitonogamy
(B) Both geitonogamy and xenogamy
(C) Geitonogamy, but not xenogamy
(D) Autogamy and geitonogamy


(A) Autogamy, but not geitonogamy


Q5. While planning for an artificial hybridisation programme involving dioecious plants, which of the following steps would not be relevant?

(A) Bagging of female flower
(B) Dusting of pollen on stigma
(C) Emasculation
(D) Collection of pollen.


(C) Emasculation


Q6. 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


(B) geitonogamy


Q7. Pollen grain of large number of species can be stored in:

(A) Liquid oxygen
(B) Liquid carbon dioxide
(C) Liquid sulphur dioxide
(D) Liquid nitrogen


(D) Liquid nitrogen


Q8. The outermost and innermost wall layers of microsporangium in an anther are respectively:

(A) Endothecium and tapetum
(B) Epidermis and endodermis
(C) Epidermis and middle layer
(D) Epidermis and tapetum.


(D) Epidermis and tapetum.


Q9. Spiny or sticky pollen grains and large, attractively coloured flowers are associated with

(A) hydrophily
(B) entomophily
(C) ornithophily
(D) anemophily


(B) entomophily


Q10. Normal Embryosac of Angiosperm is :

(A) Unicellular
(B) Bicelled
(C) Penta celled
(D) Seven called


(A) Unicellular


Q11. From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

(A) Monoecious plant bearing unisexual flowers
(B) Dioecious plant bearing only male or female flowers
(C) Monoecious plant with bisexual flowers
(D) Dioecious plant with bisexual flowers.


(B) Dioecious plant bearing only male or female flowers


Q12. Both chasmogamous and cleistogamous flowers are present in

(A) Helianthus
(B) Commelina
(C) Rosa
(D) Gossypium


(B) Commelina


Q13. In an embryo sac, the cells that degenerate after fertilisation are:

(A) Synergids and primary endosperm cell.
(B) Synergids and antipodals.
(C) Antipodals and primary endosperm cell.
(D) Egg and antipodals.


(B) Synergids and antipodals.


Q14. The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?

(A) Cotyledon
(B) Endosperm
(C) Aleurone layer
(D) Plumule


(A) Cotyledo


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

(A) Synergid, zygote and primary endosperm nucleus.
(B) Synergid, antipodal and polar nuclei.
(C) Antipodal, synergid and primary endosperm nucleus.
(D) Synergid, polar nuclei and zygote.


(A) Synergid, zygote and primary endosperm nucleus.


Q16. The development of fruits without fertilisation of the ovary, is called

(A) parthenogenesis
(B) parthenocarpy
(C) agamospermy
(D) apomixis


(B) parthenocarpy


Q17. The phenomenon wherein, the ovary develops into a fruit without fertilisation is called

(A) Apomixis
(B) Parthenocarpy
(C) Asexual reproduction
(D) Sexual reproduction


(B) Parthenocarpy


Q18. A dicotyledonous plant bears flowers but never produces fruits and seeds. The most probable cause for the above situation is :

(A) Plant is dioecious and bears only pistillate flowers
(B) Plant is dioecious and bears both pistillate and staminate flowers
(C) Plant is monoecious
(D) Plant is dioecious and bears only staminate flowers.


(D) Plant is dioecious and bears only staminate flowers.


Q19. Which of the following is not a water pollinated plant ?

(A) Zostera
(B) Vallisneria
(C) Hydrilla
(D) Cannabis


(D) Cannabis


Q20. Which structure is not found in Angiosperm?

(A) Archegonium
(B) Carpel
(C) Anther
(D) Magagametophyte


(A) Archegonium


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