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What we know about the earth …

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What we know about the earth biological systems and its functions ?

    • Posted by 48.Shashi Kumar 11J 4 years, 11 months ago

    CBSE > Class 11 > English Core
    • 1 answers

    Yogita Ingle 4 years, 11 months ago

    The earth has four principal biological systems. These are: fisheries, forests, grasslands and croplands. They form the basis of the world’s economic system. They supply us food and raw materials for industry.

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