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Question

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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Text SolutionText solutionverified iconVerified

Embryo sac is the female gametophyte of a seed plant consisting of a thin-walled sac within the ovule that contains the egg nucleus and other nuclei which give rise to endosperm on fertilization.
The type of embryo sac development depends on the number of spore nuclei entering into it.
In the monosporic, meiosis of diploid mother cell produces four haploid megastore, three of which undergo programmed cell death. In bisporic, meiosis produces only two megaspore s each containing two haploid nuclei one of which dies. In the tetrasporic cell, plate fail to form after both meiosis divisions resulting in a single four nuclear megaspore 
All megaspore can develop in eight nuclear embryo sac.
Therefore the answer is D.
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Question Text
Eight nucleate embryo sacs are
Answer TypeText solution:1
Upvotes151