Biology is a natural science concerned with the study of life and living organisms, including their structure, function, growth, origin, evolution, distribution, and taxonomy.[1] Biology is a vast subject containing many subdivisions, topics, and disciplines. Among the most important topics are five unifying principles that can be said to be the fundamental axioms of modern biology:[2]

-Cells are the basic unit of life
-New species and inherited traits are the product of evolution
-Genes are the basic unit of heredity
-An organism regulates its internal environment to maintain a stable and constant condition
-Living organisms consume and transform energy.