In algae, the reserve food material is mainly starch. Though, it may vary from class to class, e.g., S. No. Class Reserve Food-material 1. Cnlorophyceae (green-algae) Starch 2. Xanthophyceae(yellow-green) Fat 3. Chrysophyceae (yellow-green and golden) Fat and leucosin 4. Bacillariophyceae (diatoms) (yellow, golden brown and olive green) Fat and volutin 5. Cryptophyceae (red. green-blue, olive green or green coloured) Solid carbohydrates and starch 6. Dinophyceae (dark yellow, brown or red coloured) Starch or oil 7. Chlorombnadineae (bright green or olive green) Fatty compounds 8. Euglenidae or Euglenophyceae (green coloured) Paramylum 9. Phaeophyceae (brown algae) Laminarin, mannitol 10. Rhodophyceae (red algae) Floridean starch 11. Myxophyce e (cyanobacteria) (blue-green) Myxophycean starch and protein cyanophycean granules