Deciduous forests are mainly found in region where annual precipitation ranges between
$50$ to $75$ cm
$75$ to $150$ cm
$150 $ to $ 200$ cm
Above $200 $ cm
Savannah is found commonly in
Rhizophora is a characteristic component of
Which one of the following is not a gaseous biogeochemical cycle in ecosystem?
Azotobacter and Clostridium are nitrogen fixing bacteria and found in