Examples of autotrophic and heterotrophic algae.

Basically, algae are autotrophic, they are green and can synthesize their own food, with the exception of brown algae and red algae, which are non-green and heterotrophic (some of them may be autotrophic), and they are fed from different carbon sources. Galdieria sulphuraria is a particularly interesting red algae that can exist heterotrophically on over 50 different carbon sources as well as autotrophically through photosynthesis.



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