Living World of Plants - Plant Physiology One Mark Questions

9th Standard

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Science

Time : 00:30:00 Hrs
Total Marks : 20
    5 x 1 = 5
  1. A big tree falls in a forest but its roots are still in contact with the soil. The branches of this fallen tree straight up. This happens in response to __________

    (a)

    water and light

    (b)

    water and minerals

    (c)

    gravity and water

    (d)

    light and gravity

  2. The bending of root of a plant in response to water is called _________ 

    (a)

    thigmonasty

    (b)

    phototropism

    (c)

    hydrotropism

    (d)

    photonasty

  3. Desmodium gyrans is commonly known as_______________.

    (a)

    Money plant

    (b)

    Rose plant

    (c)

    Telegraph plant

    (d)

    Lilly plant.

  4. Mimosa pudica is also known as__________________.

    (a)

    Nepenthes

    (b)

    Telegraph plant

    (c)

    Dancing plant

    (d)

    Thotta Surungi

  5. The tip of the shoot is known as_______________.

    (a)

    Choleoptile

    (b)

    Colon

    (c)

    Coleorhiza

    (d)

    Collar.

  6. 5 x 1 = 5
  7. The shoot system grows upward in response to ___________

    ()


    Light

  8. __________ is positively hydrotropic as well as positively geotropic.

    ()


    Root

  9. The green pigment present in the plant is __________

    ()

    chlorophyll

  10. The leaves of __________closes on touching.

    ()

    Mimosa pudica

  11. Helianthus annus follows the path of the sun from______________.

    ()

    dawn to dusk

  12. 6 x 1 = 6
  13. The response of a plant part to the chemical stimulus is called phototropism.

    (a) True
    (b) False
  14. Shoot is positively phototropic and negatively geotropic.

    (a) True
    (b) False
  15. Scientific term used to represent the bending of roots towards water is called geotropism.

    (a) True
    (b) False
  16. The stalk of the Helianthus annus follows the path of the sun from dawn t.o dusk and during night it moves from west to east.

    (a) True
    (b) False
  17. Plants can move on their own from one location to another

    (a) True
    (b) False
  18. Desmodium gyrans was used by Charles Darwin for his experiment

    (a) True
    (b) False
  19. 4 x 1 = 4
  20. Roots growing downwards into soil

  21. (1)

    Positive geotropism

  22. Shoots growing towards the light

  23. (2)

    Positive Phototropism

  24. Shoots growing upward

  25. (3)

    Positive phototropism.

  26. Roots growing downwards away from light

  27. (4)

    Negative geotropism

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