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Question:

Pollen grains can be stored for several years in liquid nitrogen having a temperature of -196°C, -120°C, -160°C, -80°C

-196°C

-120°C

-160°C

-80°C

Solution:

The correct option is A -196°C. Pollen grains can be stored for several years in liquid nitrogen at a temperature of -196°C and this is known as cryopreservation. So, the correct answer is option A.