Evolution: A Scientific American ReaderScientific American University of Chicago Press, 2008 M09 15 - 312 páginas From the Scopes “Monkey Trial” of 1925 to the court ruling against the Dover Area School Board’s proposed intelligent design curriculum in 2005, few scientific topics have engendered as much controversy—or grabbed as many headlines—as evolution. And since the debate shows no signs of abating, there is perhaps no better time to step back and ask: What is evolution? Defined as the gradual process by which something changes into a different and usually more complex and efficient form, evolution explains the formation of the universe, the nature of viruses, and the emergence of humans. A first-rate summary of the actual science of evolution, this Scientific American reader is a timely collection that gives readers an opportunity to consider evolution’s impact in various settings. |
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... amino acids—may include more than a dozen carbon atoms per molecule. Many of these molecules, in turn, must bond together to form chainlike polymers and other molecu- lar arrays in order to accomplish life's chemical tasks. Linking ...
... amino acids and other essential or- ganic molecules. With this simple yet elegant procedure, Miller trans- formed origins-of-life research from a speculative philosophical game to an exacting experimental science. The popular press ...
... amino acids decompose rapidly when they are heated. This objection, it turns out, may be applicable only when key ... amino acids remain intact. In 1998 we conducted an experiment in which the amino acid leucine broke down within a ...
... amino acid stayed intact for days—plenty of time to react with other critical molecules. A. ROCK. TO. STAND. ON. Even if ... acids can concentrate on clay sur- faces and then link up into short chains that resemble biological proteins. These ...
... amino acid. Like many or- ganic molecules, amino acids come in two forms. Each version comprises the same types of atoms, but the two molecules are constructed as mirror images of each other. The phenomenon is called chirality, but for ...
Contenido
Cellular Evolution | 85 |
Dinosaurs and Other Monsters | 169 |
Human Evolution | 249 |
Contents | 362 |
Illustration Credits | 364 |
The Evolution of the Universe | 1 |
Cellular Evolution | 85 |
Dinosaurs and Other Monsters | 169 |
Human Evolution | 249 |