Algae

Algae An informal grouping of primitive, mainly aquatic plants that have chlorophyll a as their primary photosynthetic pigment ; body (thallus) not organized into root, stem, and leaf; range in form from simple unicellular plant plankton to massive seaweeds many metres in length. >> brown algae; chlorophyll; photosynthesis; plankton; plant; seaweed; yellow-green algae

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