Which of the following is a correct match of algal class with its characteristic reserve food?

Options

A. Chlorophyceae-starch
B. Phaeophyceae-Mannitol,laminarin
C. Rhodophyceae-Floridean starch
D. all of these.

Answer

To solve the question regarding the correct match of algal classes with their characteristic reserve food materials, we can follow these steps:

### Step-by-Step Solution:

1. **Identify Algal Classes**: We need to consider the three main classes of algae mentioned: Chlorophyceae, Pheophyceae, and Rhodophyceae.

2. **Chlorophyceae**:
- The reserve food material for Chlorophyceae is **starch**.
- Starch is a polymeric carbohydrate made up of glucose molecules.

3. **Pheophyceae**:
- The reserve food materials for Pheophyceae (brown algae) are **mannitol** and **laminarin**.
- Mannitol is a sugar alcohol derived from mannose, while laminarin is a linear polysaccharide made from mannitol.

4. **Rhodophyceae**:
- The reserve food material for Rhodophyceae (red algae) is **Floridian starch**.
- Floridian starch is also a polymeric carbohydrate similar to starch, with glucose molecules linked by alpha 1-4 bonds.

5. **Evaluate Options**:
- Based on the information gathered:
- Chlorophyceae → Starch (Correct)
- Pheophyceae → Mannitol and Laminarin (Correct)
- Rhodophyceae → Floridian Starch (Correct)

6. **Conclusion**: Since all the matches are correct, the answer to the question is **option D**, which states that all of these are correct.

### Final Answer:
**Option D: All of these are correct.**

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