Phycology (or algology) (from Greek: φύκος, phykos, "seaweed"; and λόγος, logos, "knowledge"), a subdiscipline of
botany, is the scientific study of
algae. Algae are important as
primary producers in aquatic
ecosystems. Most algae are
eukaryotic,
photosynthetic organisms that live in a wet environment. They are distinguished from the higher
plants by a lack of true
roots, stems or
leaves. Many species are single-celled and microscopic (including
phytoplankton and other
microalgae); many others are
multicellular to one degree or another, some of these growing to large size (for example,
seaweeds such as
kelp and
Sargassum).
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