Acquiring Genomes. A Theory of the Origin of Species by Lynn Margulis

By Lynn Margulis

From one of many nice iconoclasts of contemporary biology, Lynn Margulis, a groundbreaking new conception of the origins of species

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At first considered quite exceptional, symbiosis was eventually discovered to be almost universal. The microbes that live in a special stomach of the cow, for instance, and provide the enzymes for its digestion of cellulose are symbionts of the cow. Lynn Margulis has long been a leading student of symbiosis. She convinced the cytologists that mitochondria are symbionts in both plant and animal cells, as are chloroplasts in plant cells. The establishment of a new form from such symbiosis is known as symbiogenesis.

All rights reserved. Printed in the United States of America. No part of this book may be reproduced in any manner whatsoever without written permission except in the case of brief quotations embodied in critical articles and reviews. For information, address Basic Books, 387 Park Avenue South, New York NY 10016-8810. —1st ed. p. cm. ) eBook ISBN: 9780786722600 1. Species. 2. Symbiogenesis. 3. Evolution (Biology). 4. Sagan, Dorion, 1959- II. Title. 1 Bacterial Origin of Nucleated Cells Any one whose disposition leads him to attach more weight to unexplained difficulties than to the explanation of a certain number of facts will certainly reject my theory.

His sense of uniqueness and selfish interests combined with his technological profligacy have led to an unprecedented population explosion of primates. But this story is not about that ape, his lovemaking, his cohabitors, or his victims. Rather it is the tale of the nonhuman ancestors that preceded him. Before campfires, before proclamations of independence, before cities and urban sprawl, the Earth around the sun was populated by innumerable kinds of superficially alien life. The whole evolutionary saga of how species originate and how they extinguish may be the greatest tale ever to be told.

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