Living things are made up of basic units called cells, are based on a universal genetic code (DNA), obtain and use materials and energy, grow and develop, reproduce (Metabolism), respond to their environment (Stimulus), maintain a stable internal environment (Homeostasis), and change over time
Biology's big ideas are the cellular basis of life; information and heredity; matter and energy; growth, development, and reproduction; homeostasis; evolution; structure and function; unity and diversity of life; interdependence in nature (Biosphere), and science as a way of knowing.