Question

Differentiate between the following:

Red algae and Brown algae

Answer 1

	Red algae	Brown algae
1	Red algae are grouped under the class Rhodophyceae.	Brown algae are grouped under the class Phaeophyceae.
2	They contain floridean starch as stored food.	They contain mannitol or laminarin as stored food.
3	They contain the photosynthetic pigments chlorophylls a, d and phycoerythrin.	They contain the photosynthetic pigments chlorophylls a, c and fucoxanthin.
4	Their cell walls are composed of cellulose, pectin, and phycocolloids.	Their cell walls are composed of cellulose and algin.
5	Flagella are absent.	Two flagella are present.
6	Thylakoids are unstaked.	Thylakoids occur in group of three.