Sexual Reproduction In Flowering Plants Ques 71
71. Pollen grains can be stored for several years in liquid nitrogen having a temperature of [2018]
(a) $-120^{\circ} C$
(b) $-80^{\circ} C$
(c) $-160^{\circ} C$
(d) $-196^{\circ} C$
Show Answer
Answer : d
Hints & Solutions
(d) Pollen grains can be stored for severalyears in liquid nitrogen at $-196^{\circ} C$ (cryopreservation). Cryopreservation is the process of cooling and storing cells, tissues, or organs at very low temperatures; most common $-196^{\circ} C /-321^{\circ} F$ in liquid nitrogen (N2) to maintain their viability.
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