Q.
What is true for wall of pollen sac?
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a
Endothecium occurs inner to middle layers
b
Tapetum lies below the endothecium
c
Middle layers occur below the epidermis and outside the tapetum
d
Middle layers lie between endothecium and tapetum
answer is D.
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Detailed Solution
Refer NCERT text book,Vol.II, page no.21
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