CBSE 2026 · Region 1 · Set 1 · Q22 · 3 marks
(a)Do all pollen grains remain viable for the same length of time ? Support your answer with two suitable examples.(b)How are pollen grains stored in pollen banks?
(a)
Do all pollen grains remain viable for the same length of time ? Support your answer with two suitable examples.
(b)
How are pollen grains stored in pollen banks?
Marking-scheme solution
(a)
No
In cereals or rice or wheat pollen grains loose viability within $\displaystyle 30$ minutes of their release,
In some members of Rosaceae or Leguminoseae or Solanaceae –they maintain viability for months, or any other correct example
-
(b) They are stored using Cryo-preservation techniques / In liquid nitrogen at – 196oC
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CBSE Class 12 Biology past-paper question from the 2026board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.