Why anther is called as tetrasporangiate structure?

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure of Anther:**
- The anther is a part of the stamen in flowering plants and is responsible for producing pollen grains.

2. **Identifying the Chambers:**
- The anther consists of four distinct chambers. These chambers are crucial for the development of pollen.

3. **Role of Pollen Sacs:**
- Each of these four chambers contains pollen sacs where pollen grains are formed. This is essential for the reproductive process in plants.

4. **Meaning of Tetrasporangiate:**
- The term "tetrasporangiate" comes from the Greek prefix "tetra-" meaning four, and "sporangiate" referring to sporangia (the structures that produce spores). Therefore, tetrasporangiate indicates that the anther has four sporangia (pollen sacs).

5. **Dithecus Structure:**
- The anther is often described as "dithecus," which means it is divided into two lobes, each containing two of the four pollen sacs. This division allows for the efficient production and release of pollen.

6. **Conclusion:**
- Thus, the anther is called a tetrasporangiate structure because it has four pollen sacs (sporangia) that are essential for pollen formation.