Ключевые слова: algae, aquatic, biology, biotechnology, bright, cell, chlorophyta, chlorophytes, chloroplast, chromosomes, close, cytoplasm, environment, experiment, flora, food, fresh, freshness, freshwater, green, grow, growth, indicator, laboratory, living, macro, magnification, micro, microbiology, microorganism, microscope, microscopy, natural, nature, organ, pattern, plant, popular, reproduction, section, spirogyra, surface, texture, tissue, tubes, vernal, wall, water, weed, zygnematales,