Number of red list categories prepared by $WCU\; (IUCN)$ is
$6$
$7$
$8$
$9$
Which of the following pairs of an animal and a plant represents endangered organisms in India?
If we remove half of the forest cover of earth, the crisis that will occur
In which part of the biosphere reserves, human settlement is permissible?
Assertion : In tropical rain forests. $O-$ horizon and $A-$ Horizon of soil profile are shallow and nutrient-poor.
Reason : Excessive growth of micro-organisms in the soil depletes its organic content
Which of the following ecologist gave ‘rivet popper’ hypothesis?