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  1. Biology - Wikipedia

    Biology is the scientific study of life and living organisms. It is a broad natural science that encompasses a wide range of fields and unifying principles that explain the structure, function, growth, origin, …

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

    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, …

  3. Biology - Definition & Meaning, Examples, Branches and Principles

    May 26, 2022 · Biology is the branch of science that primarily deals with the structure, function, growth, evolution, and distribution of organisms. As a science, it is a methodological study of life and living …

  4. Khan Academy | Khan Academy

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  5. What is Biology? – Introduction to Living Systems

    The science of biology is very broad in scope because there is a tremendous diversity of life on Earth. The source of this diversity is evolution, the process of gradual change during which new species …

  6. Biology Basics: Key Concepts and Terminology Explained

    Biology is the scientific study of life, covering a wide range of topics essential for understanding the living world. From the microscopic details of cellular structures to broader ecological systems, biology …

  7. OpenStax

    OpenStax offers free college textbooks for all types of students, making education accessible & affordable for everyone. Browse our list of available subjects!