Grateful acknowledgmentpermission for each selection. “The Germ Game” art © 2009 by Judy MacDonald. Excerpt from “Who Says Women Can’t be Doctors? The Story of Elizabeth Blackwell“ by Tanya Lee Stone. Text © 2013 by Tanya Lee is given to the following publishers and copyright owners for permission to reprint selections from their publications. All possible care has been taken to trace ownership and secure
Stone. Art © 2013 by Marjorie Priceman. Reprinted by permission of Henry Holt Books for Young Readers. All Rights Reserved.Photo acknowledgments: Cover rawf8/Shutterstock.com; 7, 9, 11 (spots) Cre8tive Images/Shutterstock.com; 7 (RB) Geo Martinez/Shutterstock.com; 8–9 (DPS) Paul B. Moore/Shutterstock.com; 10–11 (DPS) Loisjoy
Thurstun/Alamy Stock Photo; 16 (RT) gresei/Shutterstock.com; 16 (RC) Hue Ta/Shutterstock.com; 16 (RB) Africa Studio/Shutterstock.com; 16 (LB) arka38/Shutterstock.com; 19–21 (all) Deb Porter/Cricket Media, Inc.; 26 (BG) Krivosheev Vitaly/Shutterstock.com; 26 (CC) Oksana Kuzmina/Shutterstock.com; 34 (BG) masher/Shutterstock.com; 34 (LB) Ihar Kirylenka/Shutterstock.com; back cover (RT) Nestor Rizhniak/Shutterstock.com;
back cover (CC) VGstockstudio/Shutterstock.com.
V
iruses don’t make only people sick. They
can attack other animals, plants, and
even bacteria.
When a tulip breaking virus infects a tulip
plant, it causes the solid color of the flower’s
petals to break into patches. The streaks and
stripes and feathery, flame-like patterns look
beautiful. But the virus also weakens the
plant and kills it.
The good news for gardeners is that scientists
have bred a few types of tulips that look like
the broken ones but
stay healthy.