Algae

Diverse group of photosynthetic organisms

Algae ( AL-jee, UK also AL-ghee; sing.: alga) are any of a large and diverse group of photosynthetic organisms. It excludes the land plants (embryophytes). Such organisms range from microscopic unicellular microalgae (including cyanobacteria and phytoplankton) to seaweeds, multicellular macroalgae which may grow up to 50 metres (160 ft) in length.

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