You are currently viewing Class 12 Biology MCQs Chapter – 2
Class 12 Biology MCQs Chapter - 2

Class 12 Biology MCQs Chapter – 2

1. Tapetum which develops into ovule is called :

(A) amoeboid tapetum

(B) glandular tapetum

(C) integumentary tapetum

(D) flagellar tapetum

Ans – (C)


2. In angiosperms, all the four microspores of a tetrad are covered by a layer formed of :

(A) cellulose

(B) sporopollenin

(C) pectose

(D) callose

Ans – (D)


3. Male gametophyte of anglosperms / monocots is :

(A) Mierosporangium

(B) Nucellus

(C) Microspore

(D) Stamen

Ans – (C)


4. In flowering plant a mature gametophyte is derived from a pollen mother cell by:

(A) 3 mitosis

(B) 1 meiosis and three mitosis

(C) 1 melosis and two mitosis

(D) singte meiosis

Ans – (C)


5. Chemically pollen kit is made up of :

(A) proteins

(B) lipids and carotenoids

(C) carbohydrates and carotenoids

(D) sporopollenium

Ans – (B)


6. Night blooming flowers are generally

(A) Light weight

(B) Stunted

(C) Brightly coloured

(D) Bloom in clusters

Ans – (B)


7. When a flower is brightly coloured and secretes nectar, if is most probably :

(A) pollinated by wind

(B) pollinated by insects

(C) an insectivorous plants

(D) sterile flower

Ans – (B)


8. Natural parthenogenesis occurs in :

(A) Drosophila

(B) House fly

(C) Honey bee

(D) All

Ans – (C)


9. Anther is related to :

(A) formation of pollen

(B) development of pollen

(C) opening of flower bud

(D) reception of pollen by stigma

Ans – (C)


10. Formation and differentiation of pollen grains in anther is called :

(A) megasporogenesis

(B) microsporogenesis

(C) spermiogenesis

(D) double fertilization

Ans – (B)


11. A dithecous anther contains:

(A) 4 microsporangia

(B) 3 microsporangia

(C) 2 microsporangia

(D) 1 microsporangia

Ans – (A)


12. Meiosis in anther occurs in :

(A) endothecium cells

(B) pollens

(C) tapetal cells

(D) spore mother cells

Ans – (D)


13. Pollen grains are produced in :

(A) anther

(B) stigma

(C) filament

(D) polten sac

Ans – (D)


14. The pollen is :

(A) haploid

(B) dipolid

(C) triploid

(D) tetraploid

Ans – ( A )


15. Sexual of flowering plants reproduction was discovered by :

(A) Camerarius

(B) Nawaschin

(C) Strasburger

(D) Maheswari

Ans – (A)


16. Function of tapetum is

(A) Protective

(B) Nutritive

(C) Respiratory

(D ) All of the above

Ans – (B)


17. Number of chromosomes in root cell is 14. What will be the number in synergids ?

(A) 14

(B) 21

(C) 7

(D) 28

Ans – (C)


18. Proteinaceous endosperm of maize is called

(A) apophysis

(B) scutellum

(C) coleoptile

(D) aleurone layer

Ans – (D)


19. The ovary of a flower is :

(A) haploid

(B) dipolid

(C) triploid

(D) tetraploid

Ans – (B)


20. In angiosperms the fertilization occurs in :

(A) nucellus
(B) embryo sac

(C) ovary

(D) ovule

Ans – (B)


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