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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
B2. MOTILE SINGLE-CELL ALGAE
C1. CELLS WITH ONE VISIBLE FLAGELLUM
C2. CELLS WITH TWO EQUAL LENGTH FLAGELLA
D1. CELLS ENCLOSED IN FIRM, TRANSPARANT, SPHERICAL MUCILAGE LAYER
E1. CELLS WITH BRIGHT RED OR PARTLY RED PROTOPLASTS SURROUNDED BY SPHERICAL MUCILAGE:
Haematococcus
E2. CELLS WITH GREEN PROTOPLASTS (NOT RED) SURROUNDED BY SPHERICAL OR OVAL MUCILAGE:
Vitreochlamys
D2. CELLS ENCLOSED IN RIGID LORICA
D3. CELLS NOT ENCLOSED IN LORICA OR SURROUNDED BY SPHERICAL OR OVAL MUCILAGE
C3. CELLS WITH TWO DISSIMILAR FLAGELLA
C4. CELLS WITH MORE THAN TWO FLAGELLA
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)
