The Khan G.S. Research Series set of 3 books covers key concepts in Biology, Chemistry and Physics essential for competitive exams. The Biology book starts with an overview of the living world and then delves into biochemistry, human anatomy, plant physiology and ecology. The Chemistry book explores atomic structure, chemical bonding, states of matter, chemical kinetics and thermodynamics. It also provides practice questions to help test understanding. The Physics book offers a comprehensive introduction to mechanics, properties of matter, heat, thermodynamics, waves and modern physics. Each topic is explained in a clear, easy to understand manner with diagrams and examples. This affordable set of revision guides is a must-have for students preparing for entrance exams seeking to build a strong foundation in the sciences.