CBSE 2025 · Region 2 · Set 1 · Q22 · 3 marks
(a)A bilobed dithecous anther has $\displaystyle 200$ microspore mother cells per microsporangium. How many male gametophytes can be produced by this anther ?(b)Write the composition of intine and exine layers of a pollen grains.
(a)
A bilobed dithecous anther has $\displaystyle 200$ microspore mother cells per microsporangium. How many male gametophytes can be produced by this anther ?
(b)
Write the composition of intine and exine layers of a pollen grains.
Marking-scheme solution
(a)
$\displaystyle 3200$ male gametophyte
(b)
-Intine made up of cellulose, and pectin.
-Exine made up of sporopollenin.
Sexual Reproduction in Flowering PlantsPre-fertilisation: Structures and EventsApplyshort_answermedium
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CBSE Class 12 Biology past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.