The green algae include unicellular and colonial flagellates, most with two flagella per cell, as well as various colonial, coccoid and filamentous forms, and macroscopic, multicellular seaweeds. In the Charales, the closest relatives of higher plants, full cellular differentiation of tissues occurs.There are about 8,000 species of green algae. Many species live most of their lives as single cells, while other species form coenobia (colonies), long filaments, or highly differentiated macroscopic seaweeds.n the Charales, the closest relatives of higher plants, full cellular differentiation of tissues occurs. There are about 8,000 species of green algae. Many species live most of their lives as single cells, while other species form coenobia (colonies), long filaments, or highly differentiated macroscopic seaweeds.
1 Buspirone (BuSpar), an anti-anxiety drug, is used in the treatment of general anxiety disorder.  The benzodiazepines are used to treat general anxiety disorder, social anxiety disorder, and panic disorder.
Antidepressants that are not FDA-approved for the treatment of a given anxiety disorder, such as nefazodone and mirtazapine still may be beneficial. Older antidepressants, such as TCAs and monoamine oxidase inhibitors (MAOIs), also are effective in the treatment of some anxiety disorders.