Q.20 What is common to the techniques
(i) in vitro fertilization
(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.