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Botany - Environmental Issues Practice Question Paper

12th Standard EM

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Biology

Time : 01:00:00 Hrs
Total Marks : 40
    7 x 1 = 7
  1. Find the wrongly matched pair.

    (a)

    Endemism - Species confined to a region and not found anywhere else.

    (b)

    Hotspots - Western ghats

    (c)

    Ex-situ Conservation - Zoological parks

    (d)

    Sacred groves - Saintri hills of Rajasthan

    (e)

    Alien sp. Of India - Water hyacinth

  2. Deforestation does not lead to

    (a)

    Quick nutrient cycling

    (b)

    soil erosion

    (c)

    alternation of local weather conditions

    (d)

    Destruction of natural habitat weather conditions

  3. Identify the incorrect statement with regard to Global warming

    (a)

    Leads to species enrichment

    (b)

    Decrease irrigation

    (c)

    Increases vector population 

    (d)

    Frequent heat waves

  4. Invasive species _______________

    (a)

    alter the soil system

    (b)

    are more adapted

    (c)

    are fast growing

    (d)

    all the above

  5. The ozone layer of ___________ is called bad ozone.

    (a)

    Stratosphere

    (b)

    Mesosphere

    (c)

    Troposphere

    (d)

    Exosphere

  6. Assertion (A): CO2 is a main cause for global warming
    Reason (R): Greenhouse gases trap the radiant heat from sun

    (a)

    A is correct R is incorrect.

    (b)

    A is incorrect R is correct.

    (c)

    R explains A.

    (d)

    Both A and R are incorrect.

  7. Assertion (A): Prosopis juliflora is native to Afghanistan.
    Reason (R): Alien species refers to non-native species.

    (a)

    A is correct R is incorrect.

    (b)

    A is incorrect R is correct.

    (c)

    R explains A.

    (d)

    Both A and R are incorrect.

  8. 1 x 1 = 1
  9. The production of woody plants combined with pasture is referred to ___________system

    ()

    Silvopasture

  10. 5 x 2 = 10
  11. Expand CCS.

  12. Methane is one of a potent green house gas. Point out a few sources from where methane is generated.

  13. Name the plant species which act as indicators for Nitrate pollution & Flouride pollution.

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

  15. Explain the term Carbon sink.

  16. 4 x 3 = 12
  17. How do sacred groves help in the conservation of biodiversity?

  18. What are the major activities carried out by forestry extension centers?

  19. Explain the role of lakes in an ecosystem.

  20. Due to plastic ban scheme in our state, people are gradually switching over to other optionals for daily activities. As a biology student, suggest few eco-friendly alternatives for this issue.

  21. 2 x 5 = 10
  22. Explain afforestation with case studies.

  23. Write a comparative note on Carbon Foot Print (CFP).

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