List six  advantages of ''ex-situ'' approach to conservation of biodiversity.

Advantages of ex-situ approach ?

1. Threatened plants and animals can be protected and given special cases.
2. Animals that have become extinct in the wild but can continued to be maintained in zoological parks.
3. Gametes of threatened species can be preserved in viable and fertile conditions for long periods using cryopreservation techniques.
4. Eggs can be fertilized in vitro and plants can be propagated using tissue culture methods.
5. Seeds of commercially important plants can be kept for long periods in seed banks
6. Endangered or threatened plants can be saved from extinction by keeping them in botanical gardens.