(a) Differentiate between in situ and ex situ approaches of biodiversity conservation.
(c) Explain any three ways of ex situ other than zoological parks, botanical gardens and wildlife safaries, by which threatened species of plants and animals are being conserved.

(a) In-situ conservation is the conservation of flora and fauna in their natural habitat. For example, National parks, biosphere reserves, wildlife sanctuaries. 
Ex-situ conservation is the conservation of flora and fauna outside of their natural habitat. For example, Botanical gardens, zoological parks, seed banks, tissue culture, cryopreservation, etc. Ex-situ conservation is carried out in man-made ecosystems. Endangered species are protected in the absence of natural predators. 

(c) Aquarium, gene banks and home gardens are all examples of ex-situ conservation.