Which of the following character is common for all three classes chlorophyceae, phaeophyceae and rhodophyceae of algae?

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All of the three classes have the presence of chlorophyll a and cellulose in the cell wall.

All of the three classes have the presence of chlorophyll b and have mannitol as reserve food material.

All of the three classes have floridean starch as reserve food material and are always present in fresh water.

All of the three classes have flagella for locomotion and have polysulphate esters in the cell wall.

answer is A.

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Detailed Solution

All of the three classes ( Chlorophyceae, Phaeophyceae and Rhodophyceae) have the presence of chlorophyll a and have cellulose present in the cell wall. Mannitol is the reserve food material in brown algae, floridean starch is the reserve food material for red algae and flagella are locomotory structures in green and brown algae but are absent in red algae. Presence of polysulphate esters in the cell wall is the characteristic feature of red algae.

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