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Amoeba Sisters
Carbon and Nitrogen Cycles
Explore the cycling of carbon among carbon reservoirs! Then discover the importance of nitrogen, essential for amino acids and nucleotides, and learn about the nitrogen cycle! Expand details for table of contents. Table of Contents:...
Khan Academy
Khan Academy: Silicon Based Life
Could silicon play a role similar to carbon's in supporting life? Explore this idea with this video discussing valence electrons and carbon's properties. [6:33]