Botany - Environmental Issues Model Question Paper

12th Standard EM

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Biology

Time : 01:30:00 Hrs
Total Marks : 40
    6 x 1 = 6
  1. Which of the following would most likely help to slow down the greenhouse effect.

    (a)

    Converting tropical forests into grazing land for cattle.

    (b)

    Ensuring that all excess paper packaging is buried to ashes.

    (c)

    Redesigning landfill dumps to allow methane to be collected.

    (d)

    Promoting the use of private rather than public transport.

  2. Deforestation means

    (a)

    growing plants and trees in an area where there is no forest

    (b)

    growing plants and trees in an area where the forest is removed

    (c)

    growing plants and trees in a pond

    (d)

    Removal of plants and trees

  3. People’s movement for the protection of environment in Sirsi of Karnataka is

    (a)

    Chipko movement

    (b)

    Amirtha Devi Bishwas movement

    (c)

    Appiko movement

    (d)

    None of the above

  4. The plants which are grown in silivpasture system are

    (a)

    Sesbania and Acacia

    (b)

    Solenum and Crotalaria

    (c)

    Clitoria and Begonia

    (d)

    Teak and sandal

  5. Which is not a greenhouse gas?

    (a)

    CO2

    (b)

    N2O

    (c)

    O3

    (d)

    CFC

  6. Methane is ________________ times as effective as CO2 at trapping heat.

    (a)

    5

    (b)

    10

    (c)

    20

    (d)

    100

  7. 5 x 1 = 5
  8. Baccaurea courtallensis

  9. (1)

    Southern Western Ghats

  10. Hardwickia binata

  11. (2)

    Northern India

  12. Nepenthes khasiyana

  13. (3)

    Casuarinas

  14. Invasive species

  15. (4)

    Khasi Hills

  16. Phytoindicator

  17. (5)

    Acacia

    7 x 2 = 14
  18. What is ozone hole?

  19. Expand CCS.

  20. Define global warming.

  21. What is Dobson unit?

  22. Define social forestry.

  23. Distinguish between In-situ conservation and Ex-situ conservation.

  24. What is carbon sequestration?

  25. 5 x 3 = 15
  26. How do forests help in maintaining the climate?

  27. How do sacred groves help in the conservation of biodiversity?

  28. List out the effects of global warming.

  29. Mention any three sources of carbon dioxide emission.

  30. Explain the role of lakes in an ecosystem.

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