Which character indicates that Cyanobacteria are similar to higher green plants?

Options

A. Type of cell wall
B. Nitrogen fixation ability
C. Presence of chlorophyll 'a'
D. Presence of gelatinous sheath

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which characteristic of cyanobacteria indicates their similarity to higher green plants.

2. **Reviewing the Options**: The options provided are:
- Type of cell wall
- Nitrogen fixing ability
- Presence of chlorophyll A
- Presence of gelatinous sheath

3. **Analyzing Each Option**:
- **Type of Cell Wall**: Cyanobacteria have a different type of cell wall compared to higher plants, so this option does not indicate similarity.
- **Nitrogen Fixing Ability**: While cyanobacteria can fix nitrogen, higher green plants generally do not have this ability. Thus, this option does not indicate similarity.
- **Presence of Chlorophyll A**: Both cyanobacteria and higher green plants contain chlorophyll A, which is essential for photosynthesis. This is a significant similarity.
- **Presence of Gelatinous Sheath**: This is a characteristic of cyanobacteria but not of higher green plants, so it does not indicate similarity.

4. **Conclusion**: The character that indicates cyanobacteria are similar to higher green plants is the **presence of chlorophyll A**.

5. **Final Answer**: The correct option is the **presence of chlorophyll A**.

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