Question

Pollen grains can be stored for several years in liquid nitrogen having a temperature of

• A. -196$°C$
• B. -80$°C$
• C. -120 $°C$
• D. -160 $°C$

Answer 1

The correct option is A -196$°C$

Pollen grains can be stored in liquid nitrogen (-196 degree Celsius) by a process known as cryopreservation. These stored pollen can be used as pollen banks, similar to seed banks, in crop breeding programmes.