Botany - Asexual and Sexual Reproduction in Plants Important Questions

12th Standard EM

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Biology

Time : 01:00:00 Hrs
Total Marks : 50
    10 x 1 = 10
  1. An eminent Indian embryologist is

    (a)

    S.R.Kashyap

    (b)

    P.Maheswari

    (c)

    M.S. Swaminathan

    (d)

    K.C.Mehta

  2. Size of pollen grain in Myosotis

    (a)

    10 micrometer

    (b)

    20 micrometer

    (c)

    200 micrometer

    (d)

    2000 micrometer

  3. Assertion : Sporopollenin preserves pollen in fossil deposits
    Reason : Sporopollenin is resistant to physical and biological decomposition

    (a)

    assertion is true; reason is false

    (b)

    assertion is false; reason is true

    (c)

    Both Assertion and reason are not true

    (d)

    Both Assertion and reason are true.

  4. Choose the correct statement(s) about tenuinucellate ovule

    (a)

    Sporogenous cell is hypodermal

    (b)

    Ovules have fairly large nucellus

    (c)

    sporogenous cell is epidermal

    (d)

    ovules have single layer of nucellus tissue

  5. Which of the following represent megagametophyte

    (a)

    Ovule

    (b)

    Embryo sac

    (c)

    Nucellus

    (d)

    Endosperm

  6. The unit of reproductive structure used in vegetative propagation is called as __________________

    (a)

    Diplospores

    (b)

    Aplanospores

    (c)

    Diaspores

    (d)

    Conidiospores

  7. Which of the following aquatic plant is popularly known as the "Terror of Bengal"?

    (a)

    Eichomia crassipes

    (b)

    Vallisneria spiralis

    (c)

    Pistia stratiotes

    (d)

    Zostera marina

  8. The genetic ability of a plant cell to produce the entire plant is said to be ________________

    (a)

    Multipotency

    (b)

    Totipotency

    (c)

    Pleuripotency

    (d)

    Differentiation

  9. A typical anther is ________________

    (a)

    Bisporangiate

    (b)

    Tetrasporangiate

    (c)

    Unisporangiate

    (d)

    Multisporangiate

  10. Innermost layer of anther wall is ________________

    (a)

    Endothecium

    (b)

    Endothecum

    (c)

    Endothelium

    (d)

    Tapetum

  11. 5 x 1 = 5
  12. Corm

  13. (1)

    hilum, micropyle and chalaza of ovule lie adjacent to one another

  14. Offset

  15. (2)

    body of ovule is at right angles to funiculus

  16. Hemianatropous

  17. (3)

    Colocasia

  18. Circinotropus

  19. (4)

    Elongated funiculus surrounds ovule

  20. Campylotropous

  21. (5)

    Pistia stratiotes

    5 x 2 = 10
  22. A detached leaf of Bryophyllum produces new plants. How?

  23. “Tissue culture is the best method for propagating rare and endangered plant species”- Discuss.

  24. Point out the advantages of natural vegetative reproduction

  25. Mention any two conventional propagation techniques

  26. What do you mean by terms 'stock' and 'scion' in grafting technique?

  27. 5 x 3 = 15
  28. Why does the zygote divides only after the division of Primary endosperm cell.

  29. What is Mellitophily?

  30. “Endothecium is associated with dehiscence of anther” Justify the statement

  31. How tongue grafting differs from wedge grafting?

  32. List any three advantages of micropropagation

  33. 2 x 5 = 10
  34. What is endosperm. Explain the types.

  35. Explain any five types of angiospermic ovules.

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