Interphako contrast light micrograph Euglena intermedia (Greek eu, primitive and Greek glene, eye) protists, showing the cells in metabolic movement of the elongate cells. 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.