Foundations of Biology
Biology is the scientific study of life in all its forms. One key concept to understand is emergent properties - characteristics that arise from the arrangement and interactions of parts within a system, not from the individual parts themselves.
All life is organized in a hierarchy where structure and function are closely related. The cell forms the basic unit of all life, while DNA contains the heritable information passed between generations.
Living organisms maintain balance through feedback mechanisms. A positive feedback mechanism accelerates a process as more product accumulates, while a negative feedback mechanism slows production when enough product exists. Negative feedback is the most common regulatory process in organisms.
💡 Think of negative feedback like your home thermostat - when the temperature gets too high, the system turns off heating until balance is restored.
Taxonomy is the biological classification system that organizes species into groups. The three domains of life are Bacteria and Archaea (both microscopic prokaryotes) and Eukarya (which contains plants, fungi, animals, and protists).
