Exine of pollen grains is composed of
Pectocellulose
Lignocellulose
Sporopollenine
Pollen kit
(c)Exine is made up of sporopollenine (derived from carotenoid).
Which one of the following statements is wrong?
Assertion : If pollen mother cells has $42$ chromosomes, the pollen has only $21$ chromosomes. Reason : Pollens are formed after meiosis in pollen mother cell.
In a flowering plant the largest number of haploid cells occur in
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