Article: Algae

Algae

Scientists' concepts of which organisms should be termed algae (alga, singular; algae, plural; algal, adjective) have changed radically over the past two centuries. The term algae originally referred to almost all aquatic, photosynthetic organisms. But, as more has been learned about the evolutionary

EUKARYOTIC ALGAE

Division Common Name Pigments Habitats General Morphology
Glaucophyta Chlorophyll a Freshwater Unicellular flagellates
Phycocyanin
Rhodophyta Red algae Chlorophyll a Mostly marine Unicells, filaments, thalli; no flagellated stages; some calcified, some mucilaginous
Phycoerythrin
Phycocyanin
Cryptophyta Cryptomonads ...

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