10
Question
Pollen grains of certain species are stored for several years in ___________.
Pollen grains of certain species are stored for several years in ___________.
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Solution
The correct option is A liquid nitrogen
Pollen grains of a large number of species are stored for several years in liquid nitrogen (-196 degrees Celsius). These stored pollen grains serve as pollen banks in crop breeding programmes.
Liquid nitrogen is nitrogen in a liquid state at low temperature (−196 degrees Celsius), commonly used as a coolant. It is colourless liquid with low viscosity produced industrially by fractional distillation of liquid air
Pollen grains cannot be kept viable for long in water and soil. As water and soil are subject to environmental influence that may or may not support pollen viability for too long in all the species.
The formalin (room temperature) is commonly used to store and preserve tissues for routine histology (study of tissues) in many labs.
Pollen grains of a large number of species are stored for several years in liquid nitrogen (-196 degrees Celsius). These stored pollen grains serve as pollen banks in crop breeding programmes.
Liquid nitrogen is nitrogen in a liquid state at low temperature (−196 degrees Celsius), commonly used as a coolant. It is colourless liquid with low viscosity produced industrially by fractional distillation of liquid air
Pollen grains cannot be kept viable for long in water and soil. As water and soil are subject to environmental influence that may or may not support pollen viability for too long in all the species.
The formalin (room temperature) is commonly used to store and preserve tissues for routine histology (study of tissues) in many labs.
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