microscopic view of two cone-d diatoms gomphonema with stalk on freshwater algae filament

algae aquatic biology botanical botany brightfield cell cells close cone coneshaped diatom diatoms enlarge enlarged eucaryote eukaryote filament freshwater gomphonema illumination light macro magnification magnify microalgae micrograph microphotograph microphotography microscope microscopic microscopy nature organism plant science scientific stalk transmitted two view yellowish