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The wall layer of a microsporangium that nourishes developing pollen grains and whose cells often have dense cytoplasm with more than one nucleus is the:
ATapetum
BEpidermis
CEndothecium
DMiddle layers
Answer & Solution
Correct answer: A. Tapetum
**Tapetum** is the innermost wall layer. Its cells are bi/multinucleate with dense cytoplasm — they supply nutrients to developing microspores.
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