Assertion : It is possible to store pollen grains of a large number of species for years in years in liquid nitrogen `(-196^(@)C)`
Reason : Such stored pollen can be used as pollen banks, similar to seed banks, in crop breeding programmes.

Assertion: It is possible to store pollen grains of a large number of species for years in liquid nitrogen (-196^(@)C) Reason: Such stored pollen can be used as pollen banks, similar to seed banks, in crop breeding programmes.

Read the following statements carefully and select the appropriate option given below. (i) It is possible to store pollen grains of a large number of species for years in liquid nitrogen (-196^(@)) . (ii) Cells of the nucellus have abundant reserve food materials. (iii) In a normal flower which opens and exposes the anthers and the stigma, complete autogamy is common. (iv) If both male and female flowers are present on the same plant, it prevents both autogamy and geitonogamy. (v) Cultivation of hybrids has tremendously increased productivity.

The pollen grains can be stored for years (long period) in

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

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

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

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

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

Pollen grains can be stored for years in liquid nitrogen, maintained at temperature