Carbon is present in all life
All living things contain carbon in some form, and carbon is the primary component of macromolecules, including proteins, lipids, nucleic acids, and carbohydrates. Carbon exists in many forms in this leaf, including in the cellulose to form the leaf's structure and in chlorophyll, the pigment which makes the leaf green.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"A leaf with laminar structure and pinnate venation."
http://en.wikipedia.org/wiki/Leaf%23mediaviewer/File:Leaf_1_web.jpg
Wikimedia Commons
Public domain.
