Mention the classes of Algae and their main characteristics.

(N/A) The algae are primarily divided into three main classes based on their pigments and other characteristics. The details are summarized in the table below:

Class	Common Name	Major Pigments	Stored Food	Cell Wall	Flagellar Number $\&$ Position	Habitat
Chlorophyceae	Green algae	Chlorophyll $a, b$	Starch	Cellulose	$2-8$,equal,apical	Fresh water,brackish water,salt water
Phaeophyceae	Brown algae	Chlorophyll $a, c$,Fucoxanthin	Mannitol,Laminarin	Cellulose and Algin	$2$,unequal,lateral	Fresh water (rare),brackish water,salt water
Rhodophyceae	Red algae	Chlorophyll $a, d$,Phycoerythrin	Floridean starch	Cellulose,Pectin,and Polysulphate esters	Absent	Fresh water (some),brackish water,salt water (mostly)