
Biology Portal | Britannica
The field of biology is subdivided into separate branches for convenience of study, though all the subdivisions share basic principles. Biology encompasses fields such as botany, genetics, …
Biology | Definition, History, Concepts, Branches, & Facts | Britannica
Jan 12, 2026 · Biology is a branch of science that deals with living organisms and their vital processes. Biology encompasses diverse fields, including botany, conservation, ecology, …
Biology and its branches | Britannica
An extremely broad subject, biology is divided into branches. The current approach is based on the levels of biological organization involved (e.g., molecules, cells, individuals, populations) …
Biology - Evolution, Genetics, Classification | Britannica
Jan 12, 2026 · Biology - Evolution, Genetics, Classification: There are moments in the history of all sciences when remarkable progress is made in relatively short periods of time.
Biology - Aristotle, Organisms, Cells | Britannica
Jan 12, 2026 · Biology - Aristotle, Organisms, Cells: Around the middle of the 4th century bce, ancient Greek science reached a climax with Aristotle, who was interested in all branches of …
Cell | Definition, Types, Functions, Diagram, Division, Theory,
5 days ago · cell, in biology, the basic membrane-bound unit that contains the fundamental molecules of life and of which all living things are composed. A single cell is often a complete …
Life | Definition, Origin, Evolution, Diversity, & Facts | Britannica
Jan 21, 2026 · The several branches of science that reveal the common historical, functional, and chemical basis of the evolution of all life include electron microscopy, genetics, paleobiology …
Life - Genetics, Evolution, Biology | Britannica
Jan 21, 2026 · Life - Genetics, Evolution, Biology: All organisms on Earth, from the tiniest cell to the loftiest trees, display extraordinary powers.
Reproduction | Definition, Examples, Types, Importance, & Facts ...
Jan 29, 2026 · Reproduction, process by which organisms replicate themselves. Reproduction is one of the most important concepts in biology: it means making a copy, a likeness, and …
Biology - Evolution, Genetics, Species | Britannica
Jan 12, 2026 · Biology - Evolution, Genetics, Species: In his theory of natural selection, which is discussed in greater detail later, Charles Darwin suggested that “survival of the fittest” was the …