Ключевые слова: amphibian, anatomy, animal, background, biology, birth, cell, cleavage stage, college, daphnia, detail, detailed, division, education, egg, eggs, fauna, frog, frog egg, laboratory, life, macro, male, micro, microbiology, micrograph, microorganism, microscope, microscopy, nature, photograph, school, science, small, training, transmitted, water, wildlife, zoology, zooplankton,