Eight nucleate embryo sacs are

(a) always tetrasporic 

(b) always monosporic 

(c) always bisporic 

(d) sometimes monosporic, sometimes bisporic and sometimes tetrasporic

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1 Answers

Correct option (d) sometimes monosporic, sometimes bisporic and sometimes tetrasporic

Explanation

Megaspore 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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