This document classifies algae into two categories - prokaryota and eukaryota. Prokaryota algae have an absence of a well-organized nucleus and lack membrane-bound organelles, while eukaryota algae have a well-defined nucleus surrounded by a nuclear envelope and contain membrane-bound organelles. The document then lists 12 phyla of eukaryotic algae: Euglenophyta, Chlorophyta, Charophyta, Parsinophyta, Xanthophyta, Haptophyta, Dinophyta, Bacillariophyta, Chrysophyta, Phaeophyta, Rhodophyta, and Cryptophyta.

1. Classification of Algae
Prokaryota Eukaryota
Absence of well organised with well-organized nucleus
Nucleus I.e. nucleus (with and cell organelles.
Out nuclear envelope, nucleus
) and membrane bound organelles
Absent. 1. Euglenophyta
2. Chlorophyta
3. Charophyta
4. Parsinophyta
5. Xanthophyta
6. Haptophyta
7. Dinophyta
8. Bacillariophyta
9. Chrysophyta
10. Phaeophyta
11. Rhodophyta
12. Cryptophyta