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  1. 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, evolution, genetics, …

  2. 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) and on the …

  3. Ecology | Biodiversity, Ecosystems & Conservation | Britannica

    Feb 13, 2026 · Ecology has been defined variously as “the study of the interrelationships of organisms with their environment and each other,” as “the economy of nature,” and as “the biology of ecosystems.”

  4. Anatomy | Definition, History, & Biology | Britannica

    What is anatomy in biology? Why do scientists study anatomy? What are the main systems of the human body? How do organs work together in a body system?

  5. Molecular biology | Description, Techniques, & Facts | Britannica

    Molecular biology is a field of science concerned with studying the chemical structures and processes of biological phenomena involving molecules. In particular, researchers focus on DNA, RNA, and …

  6. Virology | viruses, pathogens, disease | Britannica

    Advancements that have been made in chemistry, physics, and molecular biology since the 1960s have revolutionized the study of viruses. For example, electrophoresis on gel substrates gave a deeper …

  7. When to Capitalize School Subjects | Britannica Dictionary

    When you are talking about a school subject in a general way, you do not need to capitalize it unless it is the name of a language. For example, math and chemistry do not need to be capitalized, but French …

  8. Environmental science | Definition & Facts | Britannica

    Jan 20, 2026 · Environmental science, interdisciplinary academic field that draws on ecology, geology, meteorology, biology, chemistry, engineering, and physics to study environmental problems and …

  9. Science | Definition, Disciplines, & Facts | Britannica

    Feb 13, 2026 · The biological sciences —such as biology and medicine —study the organic world of life and its processes. The social sciences study the social and cultural aspects of human behavior. …

  10. Symbiosis | Definition, Types, & Facts | Britannica

    Feb 6, 2026 · Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an …