Q.20 What is common to the techniques
(i) in vitro fertilization
(ii) cryopreservation
(iii) tissue culture?
1. All are in situ conservation methods.
2. All are ex-situ conservation methods
3. All require ultra-modern equipment and large space.
4. All are methods of conservation of extinct organisms.
Ans. (b)AIl the three above mentioned techniques are ex-situ conservation methods. At present gametes of threatened species can be preserved in viable conditions for longer duration by cryopreservation method (at very low temperature-196°C).
Fertilization can be achieved in laboratory-in Vitro, and species can be improved or propagated by tissue culture method, a plant breeding principle.
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