Question

mention two important criteria used for classification of algae?
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Answer 1

Answer:

isogamy, anisogamy and oogamy

Explanation:

The presence or absence of sexual reproduction, complexity of reproductive organs, method of sexual reproduction i.e., isogamy, anisogamy and oogamy are important criteria of classification in algae. ... The reproduction is oogamous and life cycles are usually complex in Rhodophyceae and Phaeophyceae.

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Annotated classification

Class Bacillariophyceae (diatoms) ...

Class Bicosoecaceae. ...

Class Chrysophyceae (golden algae) ...

Class Dictyochophyceae. ...

Class Eustigmatophyceae. ...

Class Phaeophyceae (brown algae or brown seaweeds) ...

Class Prymnesiophyceae (Haptophyceae) ...

Class Raphidophyceae (Chloromonadophyceae)

Answer 2

Answer:

Algae are mainly classified on the basis of their pigments. Flagellation, storage products and chemistry of cell wall are also taken into account. The three classes of algae are Chlorophyceae (green algae), Phaeophyceae (brown algae) and Rhodophyceae (red algea).