Botany - Plant Growth and Development Book Back Questions

11th Standard

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Biology

Time : 00:30:00 Hrs
Total Marks : 20
    5 x 1 = 5
  1. Select the wrong statement from the following:

    (a)

    Formative phase of the cells retains the capability of cell division.

    (b)

    In elongation phase development of central vacuole takes place.

    (c)

    In maturation phase thickening and differentiation take place.

    (d)

    In maturation phase, the cells grow further.

  2. If the diameter of the pulley is 6 inches, length of the pointer is 10 inches and distance travelled by pointer is 5 inches. Calculate the actual growth in length of plant.

    (a)

    3 inches

    (b)

    6 inches

    (c)

    12 inches

    (d)

    30 inches

  3. In unisexual plants, sex can be changed by the application of

    (a)

    Ethanol

    (b)

    Cytokinins

    (c)

    ABA

    (d)

    Auxin

  4. Select the correctly matched one

    A) Human urine i) Auxin –B
    B) Corn gram oil ii) GA3
    C) Fungus iii) Abscisic acid II
    D) Herring fish sperm iv) Kinitin
    E) Unripe maize grains v) Auxin A
    F) Young cotton bolls vi) Zeatin
    (a)
    A B C D E F
    iii iv v vi i ii
    (b)
    A B C D E F
    v i ii iv vi iii
    (c)
    A B C D E F
    iii v vi i ii iv
    (d)
    A B C D E F
    ii iii v vi iv i
  5. Seed dormancy allows the plants to

    (a)

    overcome unfavourable climatic conditions

    (b)

    develop healthy seeds

    (c)

    reduce viability

    (d)

    prevent deterioration of seeds

  6. 1 x 2 = 2
  7. What are the parameters used to measure growth of plants?

  8. 1 x 3 = 3
  9. What is plasticity?

  10. 2 x 5 = 10
  11. Write the physiological effects of Cytokinins.

  12. Give a brief account on Programmed Cell Death (PCD)

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