Botany - Environmental Issues Book Back Questions

12th Standard EM

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Biology

Time : 00:45:00 Hrs
Total Marks : 30
    5 x 1 = 5
  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. The unit for measuring ozone thickness

    (a)

    Joule

    (b)

    Kilos

    (c)

    Dobson

    (d)

    Watt

  4. 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

  5. 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

  6. 3 x 2 = 6
  7. What is ozone hole?

  8. Give four examples of plants cultivated in commercial agroforestry.

  9. Expand CCS.

  10. 3 x 3 = 9
  11. How do forests help in maintaining the climate?

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

  13. Which one gas is most abundant out of the four commonest greenhouse gases? Discuss the effect of this gas on the growth of plants?

  14. 2 x 5 = 10
  15. Explain afforestation with case studies.

  16. What are the effects of deforestation and benefits of agroforesty?

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