Ключевые слова: animal, animals, biology, blackboard, book, chalk, chalkboard, class, classroom, clever, concept, domestic, drugs, educate, education, elementary, examination, experiment, experimental, exploration, fun, funny, genetic, genetic test, genetic testing, genetically, home, homework, humanity, knowledge, lab, laboratory, learn, lesson, microscope, rat, room, school, schooling, sitting, student, studies, study, supplies, teacher, test, testing, uniform, vaccines, white,