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How was the earth principal biological …

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How was the earth principal biological system important?

    • Posted by Ankur Singh 6 years, 3 months ago

    CBSE > Class 11 > English Core
    • 1 answers

    Sia ? 6 years, 3 months ago

    There are four principal biological systems of the earth. They are fisheries, forests, grasslands and croplands. They form the foundation of the global economic system. They supply us food.

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