By James Trefil, Robert M. Hazen
A superb textual content with the entire key insurance wanted, The Sciences: An built-in technique, seventh Edition makes a speciality of up-to-date info at the technology, examples and integration. the recent factor comprises extra digital labs, up-to-date end-of-chapter actions, broadly revised biology insurance and on-line, stepped-out math difficulties to augment challenge fixing and integration of data.
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MATHEMATICS: THE LANGUAGE OF SCIENCE To many people, science brings to mind obscure equations written in strange, undecipherable symbols. The next time you’re in the science area of your college or university, look into an advanced classroom. Chances are you’ll see a confusing jumble of formulas on the blackboard. Have you ever wondered why scientists need all those complex mathematical equations? Science is supposed to help us understand the physical world around us, so why can’t scientists just use plain English?
GREAT IDEA: A cell’s major parts are constructed from a few simple molecular building blocks. SCIENCE THROUGH THE DAY: An Afternoon Snack • 483 Organic Molecules 483 Four Basic Characteristics 483 / Chemical Shorthand 485 SCIENCE IN THE MAKING • 485 The Synthesis of Urea Proteins: The Workhorses of Life 486 Amino Acids: The Building Blocks of Proteins 486 / The Structure of Proteins 487 SCIENCE BY THE NUMBERS • 488 How Many Proteins Can You Make? Proteins as Enzymes 488 THE SCIENCE OF LIFE • 490 Proteins and Diet SCIENCE IN THE MAKING • 507 Mendel Lost and Found DNA and the Birth of Molecular Genetics 507 Nucleotides: The Building Blocks of Nucleic Acids 508 / DNA Structure 508 / RNA Structure 509 / The Replication of DNA 509 The Genetic Code 510 Transcription of DNA 510 / The Synthesis of Proteins 511 / Mutations and DNA Repair 514 / Why Are Genes Expressed?
Science gives us our most powerful tool to understand how our world works and how we interact with our physical surroundings. It not only incorporates basic ideas and theories about how our universe behaves but it also provides a framework for learning more and tackling new questions and concerns that come our way. Science represents our best hope for predicting and coping with natural disasters, curing diseases, and discovering new materials and new technologies with which to shape our world. Science also provides an unparalleled view of the magnificent order and symmetry of the universe and its workings—from the unseen world of the atomic nucleus to the inconceivable vastness of space.