‘‘Biosphere’’ is called as

  • A

    Part of atmosphere where the livings cannot live

  • B

    Part of atmosphere where the livings can live

  • C

    Both $(a) $ and $(b)$

  • D

    None of the above

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Which ecosystem does not show variations dependent upon geographic location and rainfall

Study of Biogeochemical cycles is called Biogeochemistry. Its father is Vernadsky $(=Winodgsky)$. It involves

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Give differences : carbon cycle and phosphorus cycle.

Phosphorus is required for making

$I.$ shell

$II.$ bones

$III.$ teeth

Choose the correct option

Photic or euphotic zone is how much deep from the upper surface of sea