Biological mechanisms refer to the processes and interactions that occur within living organisms to maintain life. These mechanisms include cellular functions, biochemical reactions, and physiological systems that work together to support growth, reproduction, and homeostasis. For example, the immune system protects the body from pathogens through a series of complex responses. Understanding biological mechanisms is essential for fields like medicine and biotechnology. By studying how these processes operate, scientists can develop treatments for diseases, improve agricultural practices, and create new technologies. This knowledge helps us comprehend how life functions at a molecular and systemic level.