What is the approximate number of national parks in India?

Which method is used for the preservation of gametes of threatened species?

Wildlife sanctuaries are established for the protection of specific wildlife species. Select the correct pair from the following:

What is common to the species shown in figures $A$ and $B$?

In which approach are threatened animals and plants taken out from their natural habitat and placed in a special setting where they can be protected and given special care?

Which of the following crops contain recalcitrant seeds?