Question

Describe the structure of microsporangium.

Hint:

Tapetum is the innermost nutritive layer of microsporangium, crucial for pollen development.

Answer 1

Step 1: Location.
Microsporangia are pollen sacs present in the anther of a flower. Each anther has four microsporangia.
Step 2: Structure.
1. Wall layers (from outside to inside):
- Epidermis
- Endothecium
- Middle layers
- Tapetum (nourishes pollen grains)
2. Inside → Microspore mother cells (diploid) undergo meiosis.
3. They form haploid microspores, which develop into pollen grains.
Step 3: Conclusion.
Thus, microsporangium is the pollen sac that produces pollen grains through meiosis of microspore mother cells.