Azotobacter and Clostridium are nitrogen fixing bacteria and found in
Nodulated roots
Leaves of certain plant
Free in soil
None of the above
It’s obvious.
Vertical distribution of different species occupying different levels in a biotic community is known as
Alpine plants which are commonly found at the top of mountains show
Area where two ecosystems overlap each other
Biogeochemcial cycles are of
Out of the following biogeochemical cycles which one is gaseous?
$I.$ sulphur $II.$ Phosphorus
$III.$ nitrogen $IV.$ Carbon
Choose the correct option
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