1. Unicellular (simplest form) – which may be motile or non motile (coccoid)
2. Colonial forms – An aggregation of cells acting as a single unit
Cells are interdependent
3. Filamentous thallus
(i) Simple unbranched filament
(ii) Branched thallus
4. Siphonaceous – Plant body is coenocytic (multinudeate and aseptate)
- Form septa at the time of reproduction
5. Parenchymatous thallus
- These are the most advanced among the algae
Some like heterocysts fix nitrogen into the soil (a filamentous group).
Kavungya answered the question on March 12, 2019 at 14:07
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