.
The branches of the evolutionary tree show paths of descent but do not indicate by their length the passage of time. (Note, similarly, that the vertical axis of the diagram shows major categories of organisms and not time.)
Copyright © 1994 Bruce Alberts, Dennis Bray, Julian Lewis, Martin Raff, Keith Roberts, and James D. Watson. Published by Garland Publishing, a member of the Taylor & Francis Group. No part of the publication may be reproduced or used in any form or by any means known now or invented hereafter without the permission of the publisher.