Alpine tundra is found in
Siberia
Greenland
Both $ (a)$ and $(b)$
Himalayas
$A $ : In hydrosere, reed swamp stage is followed by floating plant stage.
$R$ : Sedge meadow stage has amphibious herbaceous plants.
A natural region characterised by hot summer, warm winter and treeless vegetation
Casuarina equisetifolia is a
The maximum biological magnification of $ DDT$ through food web is seen in
Group of two or more than two plant species is called as