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Learn about the fundamental concepts of biology and the scientific method.
Learn about the basic properties of life as well as ongoing debates about the definition of life.
Unit 1 Intro to biology. Unit 2 Water, acids, and bases. Unit 3 Macromolecules. Unit 4 Elements of life. Unit 5 Energy and enzymes. Unit 6 Structure of a cell. Unit 7 More about cells. Unit 8 Membranes and transport. Unit 9 More about membranes.
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Unit 2: Biological classification. Our mission is to provide a free, world-class education to anyone, anywhere. Khan Academy is a 501 (c) (3) nonprofit organization. Donate or volunteer today!
These cohesive and adhesive properties are essential for fluid transport in many forms of life. For example, they allow nutrients to be transported to the top of a tree against the force of gravity. Water is less dense as a solid than as a liquid.
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Course: Biology archive > Unit 2. Lesson 4: Acids, bases, and pH. Autoionization of water. Arrhenius acids and bases. Brønsted–Lowry acids and bases. Definition of pH. Introduction to buffers.
This unit is part of the Biology library. Browse videos, articles, and exercises by topic.