Embryo sac is monosporic when it develops from - (a) One of the four megaspores of a megaspore m...

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Embryo sac is monosporic when it develops from -
(a) One of the four megaspores of a megaspore mother cell (MMC)
(b) 3 megaspores of a megaspore tetrad
(c) 2 megaspores
(d) The MMC where meiosis has occured but cytokinesis does not take place
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