Multiple choice

It is possible to store pollen grains of a large number of species for years in liquid nitrogen at..........

  1. 196 ℃

  2. 961 ℃

  3. 186 ℃

    • 196 ℃
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Cryopreservation of pollen grains is performed in liquid nitrogen at -196 degrees Celsius to maintain viability for long periods.