Chlorophyceae:
1. Commonly called as green algae
2. Chlorophyll ‘a’ and ‘b’ are the major photosynthetic pigments
3. Reserve food in starch.
Phaeophyceae:
1. Commonly called as brown algae
2. Chlorophyll a, c carotenoid, Xanthophylls are the photosynthetic pigments
3. Reserve food in mannitol and laminarin starch.