Biology

Biology is a branch of science employing the scientific method to describe and investigate knowledge. Scientific theories are based on scientific explanation, and these theories are sometimes advanced as new scientific information is compiled. Scientific theories can also be used to foresee phenomena that has not yet been observed. Biological systems are sometimes statistically modeled, but as in other branches of science, theories are not always described with mathematics.
The biological sciences are characterized and incorporated by several major underlying principles and concepts: universality, evolution, diversity, continuity, genetics, homeostasis, and interactions.
Many of the associate disciplines of biology, such as botany, zoology, and medicine are ancient. However, biology as a unified science first developed in the nineteenth century, as scientists exposed that all living things shared certain fundamental characteristics and were best studied as a whole. Today biology is one of the most important scientific fields. Over a million papers are published annually in a wide array of biology and medicine journals, and biology is a standard subject of instruction at schools and universities around the world.