Which one of the following is wrong about Chara

Options

A. Upper antheridium and lower oogonitum
B. Globule is male reproductive structure
C. Upper oogonium and lower round anteridium
D. Globule and nucule present on the same plant.

Explanation

To determine which statement about Chara is incorrect, we can analyze the characteristics of this green algae step by step:

### Step-by-Step Solution:

1. **Identify the Type of Organism**:
- Chara is classified as a type of green algae. This is a correct statement.

2. **Habitat**:
- Chara is primarily found in freshwater environments. This is also a correct statement.

3. **Structure**:
- Chara exhibits a branched structure, which is true. It has nodes and internodes.

4. **Understanding Nodes and Internodes**:
- In plants, a node is where leaves arise, and an internode is the segment between two nodes. This definition applies to Chara as well.

5. **Reproductive Structures**:
- Chara has distinct reproductive structures: the male reproductive organ is called the antheridium (or globule), and the female reproductive organ is called the oogonium (or nucleus).
- The statement that the upper antheridium and lower oogonium is incorrect. The correct arrangement is that the upper structure is the oogonium (female) and the lower structure is the antheridium (male).

6. **Presence of Both Reproductive Structures**:
- It is true that both the globule (male) and the nucleus (female) can be present on the same plant, making it homothallic.

7. **Conclusion**:
- The incorrect statement about Chara is that the upper antheridium and lower oogonium are positioned incorrectly. The correct positioning is that the upper structure is the oogonium (female), and the lower structure is the antheridium (male).

### Final Answer:
The wrong statement about Chara is that the upper antheridium and lower oogonium are positioned incorrectly.

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