Which class of algae produces hydrocolloids like algin?
Phaeophyceae (brown algae) produce hydrocolloids like algin, which are commercially important.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
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Which class of algae has a cell wall with algin and cellulose?
Phaeophyceae (brown algae) have cell walls made of cellulose and algin, a hydrocolloid.
Ref: NCERT Class 11 Biology Chapter 3: Plant Kingdom Algae - Phaeophyceae and Rhodophyceae
