Identify the correct statement

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In wheat and rice the pollen grain looses viability after few months.

The period for which pollen grains remain viable is highly variable and to some extent depends on the prevailing temperature and humidity.

Cryopreservation of pollen grains are done at -96ºC

Nucleus of microspore divides by symmetrical mitotic division

answer is B.

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Detailed Solution

The period for which pollen grains remain viable is highly variable and to some extent depends on the prevailing temperature and humidity is a correct statement.Whereas,In wheat and rice the pollen grain looses viability within 30 minutes of their release.Cryopreservation of pollen grains are done at -196ºC and not -96ºCNucleus of microspore divides by asymmetrical mitotic division and not by symmetrical mitosis.

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