Ключевые слова: art, background, bicycle, bike, biological, biology, botany, cartoon, cellular, cellular respiration, chloroplast, clip art, clipart, cycle, cycling, design, diagram, drawing, education, educational, energy, eps10, food, graphic, illustration, image, learn, learning, life, living, mitochondria, natural, nature, photosynthesis, photosynthesize, picture, plant, plants, process, respiration, ride, science, sciences, scientific, sunlight, transport,