Photo of Red Oak Leaves, Quercus alba
Photo of Red Oak Leaves, Quercus albaPhoto of Red Oak Leaves, Quercus albaPhoto of Red Oak Leaves, Quercus alba
Photo of Red Oak Leaves, Quercus alba
Science Image Library: Woody Plant & Tree Photos

Science Image Library
Tree Photos

from Science Prof Online
Virtual Cell Biology
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You have free access to a large collection of materials used in a college-level introductory Cell Biology Course. The Virtual Cell Biology Classroom provides a wide range of free educational resources including Power Point Lectures, Study Guides, Review Questions and Practice Test Questions.
Endomembrane System of a Eukaryotic Cell, Mariana Ruiz

Cool Tree Photo

Closeup Photo of Conifer Needles
Conifer Needles
Cool Crooked Tree Photo
Cool crooked tree. Anyone know what this is? 
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Gnarled Tree Photo
Photo of Red Oak Bark, Quercus alba
Red Oak Bark, Quercus rubra
Photo of Red Oak Leaves, Quercus alba
Red Oak Leaves, Quercus rubra
Sumac, Rhus spp Photo
Sumac, Rhus spp.
Photo of White Oak Bark, Quercus alba
White Oak Bark, Quercus alba
Lightning strike to Red Oak, Quercus rubra, affecting the bark, cambium sap layer and sapwood.
Lightning strike to Red Oak, Quercus rubra, affecting the bark, cambium sap layer and sapwood. 
Same lightning strike affected two Red Oaks (Quercus rubra), Note bark stripped off both trees and wood fragments on deck railing.
Same lightning strike affected two Red Oaks (Quercus rubra), Note bark stripped off both trees and wood fragments on deck railing.
Gnarled tree. Anyone know what this is? 
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Plant & Fungi Photo Button
SCIENCE PHOTOS
1 - 5. Snow on tree branches: Trees and bushes covered by wet snow after a Michigan storm taken winters 2010 & 2012.
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The SPO Science Image Library is a continuously growing collection of copyright- free science photographs. If you use one of our free, low-res images, we just ask that you give us credit and provide a link to the SPO website  (scienceprofonline.com).  
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Page last updated 5/2014

Plant Cell Diagram
Plant Cell 
Structure & Function 
"class notes" article from Science Prof Online.