A) Epidermis
B) Endothecium
C) Middle layers
D) Tapetum
Correct Answer: B
Solution :
Endothecium is a unilayer of radially elongated cells occurs in between the epidermis and middle layers of an angiospermic anther sac wall. Cells of endothecium have fibrous thickening in their cell walls due to which they become hygroscopic and thus, help in the dehiscence of mature anther.
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