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  1. 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, marine …

  2. Biology | Definition, History, Concepts, Branches, & Facts | Britannica

    Dec 5, 2025 · Biology is a branch of science that deals with living organisms and their vital processes. Biology encompasses diverse fields, including botany, conservation, ecology, evolution, genetics, …

  3. Biology - Evolution, Genetics, Classification | Britannica

    Dec 5, 2025 · Biology - Evolution, Genetics, Classification: There are moments in the history of all sciences when remarkable progress is made in relatively short periods of time.

  4. Life - Genetics, Evolution, Biology | Britannica

    Dec 13, 2025 · Life - Genetics, Evolution, Biology: All organisms on Earth, from the tiniest cell to the loftiest trees, display extraordinary powers.

  5. Evolution - Natural Selection, Adaptation, Genetics | Britannica

    Dec 31, 2025 · Since the late 20th century, scientists have used the techniques of molecular biology to modify or introduce genes for desired traits in a variety of organisms, including domestic plants and …

  6. biology - Students | Britannica Kids | Homework Help

    The scientific study of living things is called biology. Biologists strive to understand the natural world and its living inhabitants—plants, animals, fungi, protozoa, algae,…

  7. Cell - Differentiation, Organelles, Cytoplasm | Britannica

    Dec 10, 2025 · Over a period of time, the genetic information in RNA sequences was transferred to DNA sequences, and the ability of RNA molecules to replicate directly was lost. It was only at this point …

  8. Reproduction | Definition, Examples, Types, Importance, & Facts ...

    Dec 16, 2025 · 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 thereby providing …

  9. Cell | Definition, Types, Functions, Diagram, Division, Theory, & Facts ...

    Dec 10, 2025 · 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 organism in itself, …

  10. Molecular genetics | biology | Britannica

    Other articles where molecular genetics is discussed: heredity: Molecular genetics: The data accumulated by scientists of the early 20th century provided compelling evidence that chromosomes …