Q.
Classification of algae into II classes was made by Fritsh on the basis of flagellation, pigmentation and type of reserve food. out of this. the main criteria used in algal classification/grouping of algae is :
Fritsh divides algae into 11 classes in his book Structure and Reproductionof the Algae mainly on the basis of pigmentations, other characters were reserve food and flagellation, thallus structure, modes of reproduction and life cycle.