Interphako contrast light micrograph of Euglena intermedia (Greek eu, primitive and Greek glene, eye) protist. Euglenoids are among the most ancient lineages of eukaryotic algae. Euglenoids display a surface structure composed of parallel ribbon-like strips, running lengthwise down the cells. The algae contain Paramylon grains (a starch-like carbohydrate) as well as a characteristic red eyespot. Euglena intermedia is photosynthetic, using the energy of sunlight to synthesize food. The eyespot is sensitive to light, allowing it to move towards sunlight. Magnification: x880 when printed at 10 centimetres wide.