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

    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, marine …

  2. 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 …

  3. Biology - Evolution, Genetics, Classification | Britannica

    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. 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,…

  5. Cell - Differentiation, Organelles, Cytoplasm | Britannica

    5 days ago · 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 …

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

    Nov 4, 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 …

  7. Monosaccharide | Carbohydrate, Sugar, Glucose | Britannica

    monosaccharide, any of the basic compounds that serve as the building blocks of carbohydrates. Monosaccharides are polyhydroxy aldehydes or ketones; that is, they are molecules with more than …

  8. Biology - Aristotle, Organisms, Cells | Britannica

    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 knowledge, including biology.

  9. Biology - Evolution, Genetics, Species | Britannica

    Aug 22, 2025 · 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 basis …

  10. Asexual, Sexual, Reproductive Strategies - Britannica

    Nov 4, 2025 · George M. Moffett Professor Emeritus of Biology, Princeton University. Author of The Evolution of Complexity by Means of Natural Selection and others.