A1. Nonmotile algae without chloroplasts: Cyanobacteriophyta

A2. Nonmotile algae with chloroplasts

A3. Motile algae with chloroplasts and flagella

A4. Cells divided into paired semi-cells that are approximate mirror images of each other: Desmids

A5. Cells enclosed in glassy, ornamental frustules; many species exhibit gliding movement: Diatoms