The green algae differ from the plants by the following characteristic feature:
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Mostly aquatic forms
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Green algae exhibit a wide variety of thallus organization i.e. from unicellular, colonial, multicellular plant like forms.
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Some members of the green algae are motile.
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The thallus of green algae is not differentiated into stem, root and leaves.
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The complex multicellular green algae are like plant with the structures similar to the leaves, stems and roots.
