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Biodiversity & Environmental Issues Test - 5

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Biodiversity & Environmental Issues Test - 5
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Weekly Quiz Competition
  • Question 1
    1 / -0.25

     

    Read the following statements:
    i. Based on emission, there are point and diffusion sources of water pollution.
    ii. Fertilisers are example of point sources of water pollution.
    iii. Industrial discharge pipes are examples of diffusion sources of water pollution.

     

    Solution

     

     

    On the basis of emission of pollutants in water bodies, there are point and diffusion sources of water pollution. Fertilizers are example of diffusion sources of water and industrial discharge pipes are example of point source of water pollution. So, statement i is correct only.

     

     

  • Question 2
    1 / -0.25

     

    Low BOD will be characteristic feature of :

     

    Solution

     

     

    Low biological oxygen demand (BOD) will be characteristic feature of an oligotrophic lake. In oligotrophic lake concentration of nutrients are very low so a few organisms only survive and BOD is comparatively low.

     

     

  • Question 3
    1 / -0.25

     

    Which one of the following is a WRONG statement?

     

    Solution

     

     

    Ozone is of two type one is found is stratosphere(upper part of atmosphere) and called as stratospheric ozone (good ozone) it prevents harmful UV rays to reach us. Another is found in troposphere(lower part of atmosphere) and called as tropospheric ozone (bad ozone) its is formed by human activities and harmful for living organisms.

     

     

  • Question 4
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    All are biofuels except:

     

    Solution

     

     

    Biopetrol is fuel having characteristic similar to petrol but is produced from palmitic acid.So, it is not a biofuel. Biodiesel, marsh gas and ethanol are biofuels produced by action of microbes.

     

     

  • Question 5
    1 / -0.25

     

    Mass destruction of aquatic life will be caused by:

     

    Solution

     

     

    Mass destruction of aquatic life will be caused by broad spectrum pesticides. Broad spectrum pesticides are effective against large number of pests whether useful or harmful. These pesticides reaches to water bodies along with rain water.

     

     

  • Question 6
    1 / -0.25

     

    According to Central Pollution Control Board (CPCB), which particulate size in diameter (in micrometers) of the air pollutants is responsible for greatest harm to human health?

     

    Solution

     

     

    Particulate air pollutant like soot, fly ash, dust of various types, pollens, spores, fur, hair can be differentiated as settable and suspended particulate matter pollutant. Their effect on the environment depends upon the size of the particles. According to CPCB, particulate matter of 2.5 micrometres or less in diameter are responsible for causing great harm to human health. They are inhaled deep into the respiratory tract upto lungs and causes respiratory problems and may even lead to death

     

     

  • Question 7
    1 / -0.25

     

    The biological amplification of DDT in the various trophic levels is known as

     

    Solution

     

     

    The biological amplification of DDT in the various trophic levels is known as biomagnifications. The harmful non-biodegradable chemicals accumulate at each trophic level of a food chain.

     

     

  • Question 8
    1 / -0.25

     

    Spraying of DDT produces pollution of

     

    Solution

     

     

    Spraying of DDT produces pollution of air, water and soil. DDT is used as pesticides in agricultural field. It is non-biodegradable and reach to water bodies to pollute it. Some DDT also remains present in air as mist.

     

     

  • Question 9
    1 / -0.25

     

    A gas produced by paddy fields and involved in global warming is

     

    Solution

     

     

    Anaerobic decomposition of plants in water produces methane gas in paddy field. This gas is involved in global warming as methane is a green house gas beside carbon dioxide.

     

     

  • Question 10
    1 / -0.25

     

    Which one is MOST  toxic?

     

    Solution

     

     

    Out of the given gases carbon monoxide is the most toxic gas as it combine with hemoglobin present in blood and reduce the oxygen carrying capacity of blood.

     

     

  • Question 11
    1 / -0.25

     

    DDT is a

     

    Solution

     

     

    DDT is a non-biodegradable pollutant used as pesticides in agricultural field. It pollutes the air, water and soil if used in form of spray.

     

     

  • Question 12
    1 / -0.25

     

    As per U.S. greenhouse gas emissions report which of the following accounted for the second largest percentage of greenhouse gases?

     

    Solution

     

     

    According to U.S. greenhouse gas emissions report methane (CH4 ) accounted of the second largest percentage of greenhouse gases after Chlorofluorocarbon (CFCs).

     

     

  • Question 13
    1 / -0.25

     

    Which of the following will be able to cope with greenhouse effect?

     

    Solution

     

     

    Greenhouse effect causes increase in temperature of earth. Homeotherms can tolerate high temperature. So, homeotherms will be able to cope with the effect of green house effect.

     

     

  • Question 14
    1 / -0.25

     

    Earth is protected from ultra-violet radiations by means of

     

    Solution

     

     

    Earth is protected from ultra-violet radiations by means of ozone layer. Ozone layers are present in stratosphere of atmosphere that absorbs the UV radiations and protect us from its harmful effects.

     

     

  • Question 15
    1 / -0.25

     

    Ozone depletion shall cause higher incidence of

     

    Solution

     

     

    Ozone depletion shall cause higher incidence of skin cancer, cataract and decreased immunity.

     

     

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