Multiple choice The normal or Polygonum type of embryo sac is bisporic eight-nucleate monosporic four-nucleate tetrasporic sixteen-nucleate monosporic eight-nucleate Reveal answer Fill a bubble to check yourself D Correct answer Explanation The Polygonum type of embryo sac is the most common type in angiosperms. It is monosporic, meaning it develops from a single megaspore, and it contains eight nuclei.