Question

what is algae answer briefly

Answer 1

Algae  singular alga is an informal term for a large, diverse group of photosyntheticorganisms that are not necessarily closely related, and is thus polyphyletic. Included organisms range from unicellular microalgae genera, such as Chlorella and the diatoms, to multicellular forms, such as the giant kelp, a large brown alga which may grow up to 50 m in length.