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11th Standard Botany - Plant Growth and Development English Medium Free Online Test One Mark Questions 2020 - 2021

11th Standard

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Botany

Time : 00:10:00 Hrs
Total Marks : 10

    Answer all the questions

    10 x 1 = 10
  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. Seed dormancy allows the plants to

    (a)

    overcome unfavourable climatic conditions

    (b)

    develop healthy seeds

    (c)

    reduce viability

    (d)

    prevent deterioration of seeds

  3. The term synergistic action of hormones refers to

    (a)

    When two hormones act together but brings about opposite effects.

    (b)

    When two hormones act together and contribute to the same function.

    (c)

    When one hormone affects more than one function.

    (d)

    When many hormones bring about opposite effects

  4. During exponential phase of growth one of the following changes does not occur. Identify it

    (a)

    Addition of protoplasm

    (b)

    Growth rate becomes zero

    (c)

    Deposition of cell wall material

    (d)

    Development of central vacuole

  5. Kurosawa found plants suffering from Bakanae disease. This led to discovery of ................

    (a)

    GA

    (b)

    Cytokinin

    (c)

    ethylene

    (d)

    2,4, D

  6. The.term kinetin was coined by .................

    (a)

    Skoog

    (b)

    Haberlandt

    (c)

    Kurosawa

    (d)

    Lethon

  7. Bio Assay of ABA was done with

    (a)

    cotton bolls

    (b)

    Pineapple

    (c)

    Rice

    (d)

    Sugarcane

  8. .............. is a day neutral plant.

    (a)

    Bryophyllum

    (b)

    Wheat

    (c)

    Tobacco

    (d)

    Tomato

  9. The growth rate becomes zero in .............. phase.

    (a)

    Decelerating

    (b)

    maturation

    (c)

    exponential

    (d)

    lag

  10. The name Gibberellin was coined by .............

    (a)

    Went

    (b)

    Kurosawa

    (c)

    Yabuta

    (d)

    Lethan

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