explain three different types of embryo sac found in angiosperms?
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Embryo sacs are usually classified into three main types: mono- sporic, bisporic and tetrasporic. ... Monosporic embryo sacs fall under two types: eight-nucleate and four-nucleate. In the former the megaspore mother cell gives rise to a dyad (end of Meiosis I), and then to a tetrad of megaspores (end of Meiosis II).
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