‘‘Biosphere’’ is called as
Part of atmosphere where the livings cannot live
Part of atmosphere where the livings can live
Both $(a) $ and $(b)$
None of the above
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
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