Ubisch bodies are present in
Pollen tube
Pollen grain
Microspore
Tapetum
(d)Ubisch bodies of lipid nature are also secreted by tapetum.
Draw the diagram of a microsporangium and label its wall layers. Write briefly about the wall layers ?
An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
Identify the structures marked $A$ to $F$ in the given diagram
…… posses dense cytoplasm and generally have more than one nucleus
The most resistant organic material known which makes up the outermost layer of pollen wall is
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