A) always bisporic
B) always tetrasporic
C) always monosporic
D) sometimes monosporic, sometimes bisporic and sometimes tetrasporic
Correct Answer: D
Solution :
Megapore is a haploid structure which divides and gives rise to embryo sac which is also called as female gametophyte. Eight-nucleate embryo sacs may be monosporic (e.g.. Polygonum); or bisporic (e.g., Allium); or tetrasporic (e.g., Adoxa).
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