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If there were no green plants, all life ...

If there were no green plants, all life on the earth would come to an end ! Comment.

Text Solution

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1) Without plants there could be no life on earth.
2) Plants are the only organisms that can make their own food and all other living beings directly or indirectly depend on plants for their food.
3) Moreover plants release oxygen into the atmosphere through photosynthesis.
4) Oxygen is essential for the organisms to respire.
5) Hence without green plants , all life on the earth would come to an end.
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Knowledge Check

  • Atmosphere, hydrosphere, lithosphere and biosphere are the four main segments of the environment. Atmosphere is a cover of gases that extends to a height of about 1600 km above the surface of the earth and protects the life on the earth from harmful radiations coming from the sun or the outer space. Atmosphere is further divided into four regions such as troposphere, stratosphere, mesosphere and thermosphere. Hydrosphere forms that part of the environment which contains water. Lithosphere is the solid component of the earth consisting of soil, rocks, mountains etc. Biosphere is that part of the above segments where living organisms interact with these parts and live together. The biotic component of the environmentis

    A
    Lithosphere
    B
    Biosphere
    C
    Hydrosphere
    D
    Atmosphere

  • Atmosphere, hydrosphere, lithosphere and biosphere are the four main segments of the environment. Atmosphere is a cover of gases that extends to a height of about 1600 km above the surface of the earth and protects the life on the earth from harmful radiations coming from the sun or the outer space. Atmosphere is further divided into four regions such as troposphere, stratosphere, mesosphere and thermosphere. Hydrosphere forms that part of the environment which contains water. Lithosphere is the solid component of the earth consisting of soil, rocks, mountains etc. Biosphere is that part of the above segments where living organisms interact with these parts and live together. Hydrogen and Helium are found in which of the following regions ?

    A
    Mesosphere
    B
    Exosphere
    C
    Troposphere
    D
    Stratosphere

  • Atmosphere, hydrosphere, lithosphere and biosphere are the four main segments of the environment. Atmosphere is a cover of gases that extends to a height of about 1600 km above the surface of the earth and protects the life on the earth from harmful radiations coming from the sun or the outer space. Atmosphere is further divided into four regions such as troposphere, stratosphere, mesosphere and thermosphere. Hydrosphere forms that part of the environment which contains water. Lithosphere is the solid component of the earth consisting of soil, rocks, mountains etc. Biosphere is that part of the above segments where living organisms interact with these parts and live together. Which of the following is the coldest region ?

    A
    Mesosphere
    B
    Tropospere
    C
    Stratosphere
    D
    Thermospehere

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