The normal or Polygonum type of embryo sac is | vedclass

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(D) The $Polygonum$ type of embryo sac is the most common type of embryo sac found in angiosperms.It develops from a single functional megaspore,which

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Monosporic eight nucleate

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(D) The $Polygonum$ type of embryo sac is the most common type of embryo sac found in angiosperms.It develops from a single functional megaspore,which is why it is called $Monosporic$.During its development,the nucleus of the functional megaspore undergoes three successive free nuclear mitotic divisions,resulting in the formation of $8$ nuclei.Therefore,it is characterized as $Monosporic$ and $eight-nucleate$.

Column-$I$	Column-$II$
$(a)$ Funicle	$(i)$ Small opening of ovule
$(b)$ Integuments	$(ii)$ Stalk of ovule
$(c)$ Chalaza	$(iii)$ Protective envelopes of ovule
$(d)$ Hilum	$(iv)$ Junction part of ovule and stalk
$(e)$ Micropyle	$(v)$ Base of ovule

The normal or $Polygonum$ type of embryo sac is

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In angiosperms,the functional megaspore develops into

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Definitions / Explanation:
$1.$ Perisperm
$2.$ Chalaza

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