The microsporangia develop further and become:

Answer

**Step-by-Step Solution:**

1. **Understanding Microsporangia**: Microsporangia are structures found in the anthers of flowering plants. They are crucial for the male reproductive process.

2. **Origin of Microsporangia**: Microsporangia develop from microspore mother cells (MMC) through a process called meiosis. This process reduces the chromosome number and leads to the formation of microspores.

3. **Development into Pollen Sacs**: After the formation of microspores, the microsporangia further develop into pollen sacs. These sacs are specialized structures that store and protect the pollen grains.

4. **Function of Pollen Sacs**: The pollen sacs contain pollen grains, which are the male gametes of flowering plants. These grains are essential for fertilization.

5. **Nutritional Support**: Inside the microsporangia, there are porogenous tissues that provide nutrition to the developing pollen grains, ensuring their viability and functionality.

6. **Final Answer**: Therefore, the microsporangia develop further and become pollen sacs that contain pollen grains.

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