Biology is a scientific field that studies living organisms and their interactions with the environment. HEREDITY is the passing of genetic information from one generation to the next, and is an important part of biology. LIFE is the state of being alive, and is studied in biology to understand how organisms interact with their environment. Cells are the basic unit of LIFE, and are studied in biology to understand how they work together to form complex organisms. Finally, the lifecycle is the sequence of stages that an organism goes through from birth to death, and is studied in biology to understand how organisms develop and reproduce.