Ключевые слова: algae, anatomy, animal cell, background, beneficial, biological, biology, botanic, botanical, botany, bug, cell, chloroplast, cilia, closeup, cytoplasm, detail, freshwater, hydrilla, infective, lab, laboratory, light, macro, magnification, management, membrane, microscope, microscopic, nature, nucleus, organism, parasite, pattern, plankton, plant, pond, protista, protozoa, protozoan, research, science, scientific, slide, species, texture, under, unicellular, vacuole, water,