Light micrograph of Volvox taken using Rheinberg illumination. Volvox form large (approximately 500 µm) spherical colonies that can contain up to 15,000 biflagellate, photosynthetic cells embedded i...

Light micrograph of volvox. Volvox are a relatively large (approximately 500 µm) green algae. They consist of hollow spherical colonies with up to 15,000 cells embedded in their gelatinous walls. E...