What are uses and significance of sulfated polygalactans in cell wall of red algae?

Explanation

**Step-by-Step Solution:**

1. **Introduction to Red Algae:**
- Red algae belong to the class Rhodophyceae. They are characterized by their red pigments, which are primarily due to the presence of phycoerythrin.

2. **Sulfated Polyglycans in Red Algae:**
- The cell wall of red algae contains sulfated polyglycans, which are important polysaccharides. Two notable examples are agar and carrageenan.

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