euglena . labeled microorganism structure or description

algae animal apparatus autotrophy bacteria biology carbohydrate cell chloroplast contractile description diagram education educational endoplasmic euglena euglenoidea eukaryote eyespot flagellate flagellum fungi genus golgi graphic green illustration inside membrane microbiology microorganism microscopy mitochondria nature nucleolus nucleus organism photoreceptor plant reticulum scheme science small species stigma structure unicellular vacuole vector zoology