The Polygonum type of embryo sac is .....

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(A) The Polygonum type of embryo sac is the most common type of embryo sac found in angiosperms.It develops from a single functional megaspore (monosp

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$7$-celled,$8$-nucleate

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(A) The Polygonum type of embryo sac is the most common type of embryo sac found in angiosperms.It develops from a single functional megaspore (monosporic development).During its development,the nucleus undergoes three successive mitotic divisions,resulting in $8$ nuclei.These nuclei are organized into $7$ cells: $3$ antipodal cells,$2$ synergids,$1$ egg cell,and $1$ central cell containing $2$ polar nuclei.Therefore,it is described as $7$-celled and $8$-nucleate.

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