Question

Explain the structure of the wall of pollen sac

Answer 1

Answer:

Microsporangium is the sporangial structure which contains microspores which are the pollen sacs giving rise to male gametes in an angiosperm. ... The innermost layer is tapetum, which provides nutrition to the developing pollen cells. The cells of tapetum may be multinucleate.Oct 15, 2019

Answer 2

Explanation:

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