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Eight nucleate embryo sacs are

1. always tetrasporic
2. always monosporic
3. always bisporic
4. sometime monosporic, sometimes bisporic and sometimes tetrasporic

Correct answer: sometime monosporic, sometimes bisporic and sometimes tetrasporic

Solution

Eight-nucleate embryo sacs can arise from different developmental pathways. Depending on whether they develop from one, two, or four megaspore nuclei, they may be monosporic, bisporic, or tetrasporic respectively.

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