How and Why Species Multiply PDF ePub eBook

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How and Why Species Multiply free pdf Charles Darwin's experiences in the Galpagos Islands in 1835 helped to guide his thoughts toward a revolutionary theory: that species were not fixed but diversified from their ancestors over many generations, and that the driving mechanism of evolutionary change was natural selection. In this concise, accessible book, Peter and Rosemary Grant explain what we have learned about the origin and evolution of new species through the study of the finches made famous by that great scientist: Darwin's finches. Drawing upon their unique observations of finch evolution over a thirty-four-year period, the Grants trace the evolutionary history of fourteen different species from a shared ancestor three million years ago. They show how repeated cycles of speciation involved adaptive change through natural selection on beak size and shape, and divergence in songs. They explain other factors that drive finch evolution, including geographical isolation, which has kept the Galpagos relatively free of competitors and predators- climate change and an increase in the number of islands over the last three million years, which enhanced opportunities for speciation- and flexibility in the early learning of feeding skills, which helped species to exploit new food resources. Throughout, the Grants show how the laboratory tools of developmental biology and molecular genetics can be combined with observations and experiments on birds in the field to gain deeper insights into why the world is so biologically rich and diverse. Written by two preeminent evolutionary biologists, How and Why Species Multiply helps to answer fundamental questions about evolution--in the Galpagos and throughout the world.

About Peter R. Grant

Peter R. Grant is the Class of 1877 Professor of Zoology at Princeton University. His books include "Ecology and Evolution of Darwin's Finches" (Princeton). B. Rosemary Grant is a senior research scholar in the Department of Ecology and Evolutionary Biology at Princeton University. She is the coauthor, with Peter R. Grant, of "Evolutionary Dynamics of a Natural Population: The Large Cactus Finch of the Galapagos".

Details Book

Author : Peter R. Grant
Publisher : Princeton University Press
Data Published : 22 October 2007
ISBN : 0691133603
EAN : 9780691133607
Format Book : PDF, Epub, DOCx, TXT
Number of Pages : 240 pages
Age + : 15 years
Language : English
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