First slide

Pre-fertilisation : Structures and Events

Question

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

Easy

A

-120°C
B

-80°C
C

- 196°C
D

- 160°C

Solution

It is possible to store pollen grains of a large number of species for years in liquid nitrogen ( $- 196^{0} C$ ). This process is known as cryo-preservation. Such stored pollen can be used as pollen banks, similar to seed banks, in crop breeding programmes.

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