Which of these statements is true about chara?

Options

A. Oogonium and antheridium are present on different plants.
B. Oogonium is placed in the upper part and antheridium in the lower part
C. Oogonium is placed in the lower part and antheridium in upper part
D. Chara belongs to angiosperm

Answer

To determine which statement is true about Chara, we can analyze each option based on the characteristics of this multicellular green algae.

### Step-by-Step Solution:

1. **Understanding Chara**:
- Chara is a genus of green algae that is classified as multicellular. It is important to know its reproductive structures to answer the question correctly.

2. **Identifying the Male and Female Structures**:
- In Chara, the male reproductive organ is called the **antheridium**, which is typically spherical and yellow in color.
- The female reproductive organ is called the **oogonium**, which is oval-shaped and green.

3. **Analyzing the Options**:
- **Option A**: "Oogonium and Antheridium are present on different plants."
- This statement is false because Chara is monoecious, meaning both reproductive organs are found on the same plant.

- **Option B**: "Oogonium is placed in the upper part and Antheridium in the lower part."
- This statement is true. In Chara, the oogonium is located at the upper part of the plant, while the antheridium is found at the lower part.

- **Option C**: "Oogonium is placed in the lower part and Antheridium in the upper part."
- This statement is false as it contradicts the known positioning of the reproductive organs in Chara.

- **Option D**: "Chara belongs to Angiosperm."
- This statement is false. Chara is not an angiosperm; it is classified as an algae.

4. **Conclusion**:
- The correct answer is **Option B**: "Oogonium is placed in the upper part and Antheridium in the lower part."