A) epidermis
B) endothecium
C) middle layer
D) tapetum
Correct Answer: D
Solution :
Tapetum has a number of functions. (i) Nourishment of the developing microspore mother cells and pollen grains. (ii) Secretion of enzymes and hormones. (iii) Production of ubisch granules for forming exine of pollera grain. (iv) Secretion of pollenkit in case of entomophilous pollen grains.
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