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Question

Which of the following structures in Pinus are haploid?

A
Megaspore, integument, root
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B
Endosperm, mega spore, pollen grain
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C
Pollen grain, leaf, root
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D
Megaspore, endosperm, embryo
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Solution

The correct option is B Endosperm, mega spore, pollen grain
Because endosperm is haploid (n) and formed before fertilization and mega spore mother cell divides reductionally to form a linear tetrad of haploid megaspores and microspore (pollen grain) is the first stage of the gametophyte (n).

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