The gametangia and sporangia of Ulothrix are

Options

A. jacketed and multicellular
B. jacketed and unicellular
C. nonjacketed and multicellular
D. non-jacketed and unicellular

Answer

**Step-by-Step Solution:**

1. **Understanding Ulothrix**:
- Ulothrix is a type of green algae that typically grows in freshwater environments, such as ponds. It belongs to the kingdom Plantae and is classified under the class Thalophyta.

2. **Class Thalophyta**:
- Thalophyta includes plants that do not have a vascular system. This means that they lack specialized tissues for transporting water and nutrients.

3. **Plant Body Structure**:
- In Thalophyta, the plant body is not differentiated into distinct structures like stems, leaves, or roots. Instead, the entire plant exists as an undivided mass of cells known as a thallus.

4. **Gametangia and Sporangia**:
- The terms gametangia and sporangia refer to the reproductive structures of Ulothrix. Gametangia are the organs that produce gametes (sex cells), while sporangia are the structures that produce spores.

5. **Characteristics of Gametangia and Sporangia in Ulothrix**:
- In Ulothrix, both gametangia and sporangia are unicellular, meaning they consist of a single cell. Additionally, they are non-jacketed, which indicates that these reproductive organs are not surrounded by any protective layer of sterile cells.

6. **Conclusion**:
- Based on the characteristics of gametangia and sporangia in Ulothrix, we conclude that they are unicellular and non-jacketed. Therefore, the correct answer is that the gametangia and sporangia of Ulothrix are non-jacketed and unicellular.

**Final Answer**: The gametangia and sporangia of Ulothrix are non-jacketed and unicellular.

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