Q.Complete the following table about the three groups of algae:
Groups of algae: Chlorophyceae, Phaeophyceae, Rhodophyceae
- Stored food -- Chlorophyceae: Starch; Phaeophyceae: ______; Rhodophyceae: ______
- Cell Wall -- Chlorophyceae: ______; Phaeophyceae: Cellulose and algin; Rhodophyceae: ______
- Major pigments -- Chlorophyceae: ______; Phaeophyceae: ______; Rhodophyceae: Chl-a, d and Phycoerythrin
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Stored food. Chlorophyceae store food as true starch (given). Phaeophyceae store mannitol, laminarin and starch. Rhodophyceae store Floridean starch, a form unique to red algae.
Cell wall. Chlorophyceae have a cellulose cell wall. Phaeophyceae have cellulose, fucans and algin (given). Rhodophyceae have cellulose and pectin glued together with other carbohydrates.
Major pigments. Chlorophyceae carry chlorophyll a and b. Phaeophyceae carry chlorophyll a and c along with fucoxanthin. Rhodophyceae carry chlorophyll a and d along with phycoerythrin (given).
| Feature | Chlorophyceae | Phaeophyceae | Rhodophyceae |
|---|---|---|---|
| Stored food | true starch | mannitol, laminarin, starch | Floridean starch |
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