Photic or euphotic zone is how much deep from the upper surface of sea
$10$ metres
$100 $ metres
$200 $ metres
$500$ metres
It’s obvious.
Why are nutrient cycles in nature called biogeochemical cycles ?
Choose the area which will take minimum time for succession
Definitions / Explanation :
$(i)$ Sere
$(ii)$ Standing state
All types of latitudinal biomes are found telescoped on high hills found in
In carbon cycle, source of carbon to plants is
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