Living World of Plants - Plant Physiology Book Back Questions

9th Standard

    Reg.No. :
  •  
  •  
  •  
  •  
  •  
  •  

Science

Time : 00:45:00 Hrs
Total Marks : 30
    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 tropic movement that helps the climbing vines to find a suitable support is ________. 

    (a)

    phototropism

    (b)

    geotropism

    (c)

    thigmotropism

    (d)

    chemotropism

  3. The chemical reaction occurs during photosynthesis is ________. 

    (a)

    CO2 is reduced and water is oxidized

    (b)

    water is reduced and CO2 is oxidized

    (c)

    both CO2 and water are oxidized

    (d)

    both CO2 and water are produced

  4. The plant part which exhibits negative geotropism is __________.

    (a)

    root

    (b)

    stem

    (c)

    branch

    (d)

    leaves

  5. The non-directional movement of a plant part in response to temperature is called ________.

    (a)

    thermotropism

    (b)

    Thermonasty

    (c)

    chemotropism

    (d)

    thigmonasty

  6. 3 x 1 = 3
  7. Plants may inhale carbon dioxide for photosynthesis but need ___________ for their living.

    ()

    Oxygen

  8. Plants utilize only _______% of the absorbed water for photosynthesis and the other activities.

    ()


    1

  9. Plants inhale and exhale continuously through the __________.

    ()


    Stomata

  10. 5 x 1 = 5
  11. The response of a plant part to the chemical stimulus is called phototropism.

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

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

    (a) True
    (b) False
  14. Joseph Priestley devised an experiment to find out that water alone was the cause of the increase in the weight of the plant.

    (a) True
    (b) False
  15. When the weather is hot, water evaporates lesser which is due to opening of stomata.

    (a) True
    (b) False
  16. 4 x 1 = 4
  17. Roots growing downwards into soil

  18. (1)

    Positive Phototropism

  19. Shoots growing towards the light

  20. (2)

    Negative geotropism

  21. Shoots growing upward

  22. (3)

    Positive geotropism

  23. Roots growing downwards away from light

  24. (4)

    Positive phototropism.

    4 x 2 = 8
  25. Give an example for a plant whose leaf shows a mesmerizing movement.

  26. What is the end product of photosynthesis?

  27. Name the minute openings seen on the lower surface of the leaf.

  28. Give an example for negative hydrotropism.

  29. 1 x 5 = 5
  30. Design an experiment to demonstrate hydrotropism.

*****************************************

Reviews & Comments about 9th Standard Science Unit 6 Living World of Plants - Plant Physiology Book Back Questions

Write your Comment