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A1. NONMOTILE ALGAE WITHOUT CHLOROPLASTS:
CYANOBACTERIA
A2. NONMOTILE ALGAE WITH CHLOROPLASTS
A3. MOTILE ALGAE WITH CHLOROPLASTS AND FLAGELLA
B1. MOTILE COLONIES WITH TWO OR MORE CELLS
C1. CELLS WITH TWO EQUAL FLAGELLA
C2. CELLS WITH TWO DISSIMILAR FLAGELLA
D1. CELLS COVERED WITH SMALL SCALES (SCALED CHRYSOPHYTES); MAY ALSO HAVE SHORT OR LONG SPINES
D2. CELLS NOT COVERED WITH SCALES OR SPINES
B2. MOTILE SINGLE-CELL ALGAE
A4. CELLS DIVIDED INTO MIRROR-IMAGE SEMI-CELLS:
Desmids
(see key at
cedar.wwu.edu/cedarbooks/14/
)
A5. CELLS ENCLOSED IN GLASSY, ORNAMENTAL FRUSTULES:
Diatoms
(see key at
diatoms.org)
