A virus is a microscopic organism that contains genetic information but cannot reproduce itself. To replicate, a virus must invade another cell, insert its own DNA into the unfortunate host, then take over that cell's reproductive machinery.
Excerpted from The K.I.S.S. Guide to Cat Care by Steve Duno
Copyright 2001 by Steve Duno.
Excerpted by permission of Dorling Kindersley Publishing Inc.
All rights reserved.
No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.