1. Education

Petri Dishes

Science Pictures

By

Kyra Williams with petri dishes and a dissecting microscope.

Kyra Williams with petri dishes and a dissecting microscope.

Scott Bauer, USDA
U.S. Department of Agriculture (USDA) images are considered to be public domain, unless stated otherwise. If you use this image, please cite the source and photographer.

©2014 About.com. All rights reserved.