Which of the following methods can be used to devise strategies for the conservation of endangered and extinct species?

Plants like $Aegle \text{ } marmelos$, $Ocimum \text{ } sanctum$ and $Ficus \text{ } religiosa$ are a group of plants designated as

Provide the definitions/explanations for the following:
$(i)$ Gene Bank
$(ii)$ Ex-situ Conservation

Wildlife conservation aims at:
$I$. Maintaining the ecological process.
$II$. To enrich the wildlife diversity with exotic species.
$III$. Preventing migration of species.
$IV$. Maintaining the diversity of life.
The correct statements are:

The Hoolock gibbon (India's only ape) is found in:

Biosphere reserves differ from National parks and Wildlife sanctuaries because in the former