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Welcome to biology! Biologists study life at many scales, from individual cells to organisms to the entire biosphere (planet Earth). Jump in to learn more about the key themes of biology and the properties of living things.
And so over the course of what you see in Biology on Khan Academy, we're going to answer these fundamental, fascinating questions. We're going to think about things like energy and the role of energy in life.
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 specific topic under investigation (e.g., structure and function, growth and development).
Apr 19, 2024 · biology. Also known as: cell system. Written by. L. Andrew Staehelin. Professor of Cell Biology, University of Colorado, Boulder. Coeditor of Encyclopedia of Plant Physiology ( vol. 19 ). L. Andrew Staehelin, John A. Cooper. Professor of Cell Biology and Physiology, Washington University, St. Louis, Missouri. John A. Cooper, Wilfred D. Stein.
1 Getting Started. 2 Biology - The Life Science. 3 The Nature of Molecules. 4 Chemical Building Blocks of Life. 5 Life: History and Origin. 6 Cells. 7 Cell structure. 8 Structure of Eukaryotic cells. 9 Membranes. 10 Cell-cell interactions. 11 Energy and Metabolism. 12 Respiration: harvesting of energy. 13 Photosynthesis. 14 Sexual reproduction.
Feb 2, 2022 · Biology is the study of life. The word "biology" is derived from the Greek words "bios" (meaning life) and "logos" (meaning "study"). In general, biologists study the structure, function, growth,...
May 26, 2022 · Biology is the branch of science that primarily deals with structure, function, growth, evolution, and distribution of organisms. Find out more about biology definition, principles, branches, and importance.
