Red algae do not have

Options

A. zoospores,hypnospores and aplanospores
B. Cellulose in cell wall
C. Floridean starch
D. Sexual reproduction.

Answer

**Step-by-Step Solution:**

1. **Understanding Red Algae**: Red algae belong to the class Rhodophyceae and can be found in both freshwater and saltwater environments. They are characterized by their unique pigments, primarily chlorophyll A and D.

2. **Key Features of Red Algae**:
- **Photosynthetic Pigments**: Red algae contain chlorophyll A and D, which are essential for photosynthesis.
- **Stored Food**: The stored food in red algae is in the form of Floridian starch.
- **Cell Wall Composition**: The cell wall of red algae contains cellulose.
- **Reproduction**: Red algae can reproduce sexually through conjugation, which does not require flagella.

3. **Absence of Flagella**: A significant characteristic of red algae is that they lack flagella, making them non-motile. This is crucial because it differentiates them from other algae, such as brown algae, which do have flagellated spores.

4. **Analyzing the Options**:
- **Option 1**: Hypnospore, aplanospore, and zoospore. Here, hypnospore and aplanospore are non-motile spores associated with asexual reproduction in red algae. However, zoospore is a motile spore that possesses flagella and is not found in red algae.
- **Option 2**: Sexual reproduction occurs in red algae. This is true since they can reproduce through conjugation.
- **Option 3**: Floridian starch is the stored food in red algae. This is also true.
- **Option 4**: Cellulose in the cell wall. This is a true feature of red algae.

5. **Conclusion**: The only option that does not represent a feature of red algae is the presence of zoospores, as they are motile and contain flagella, which red algae lack.

**Final Answer**: Red algae do not have zoospores.

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