What do these four elements - carbon, hydrogen, oxygen, and nitrogen, make up more than 96% of?
1 Answer
Jul 28, 2017
Explanation:
Add in a few other elements, say sulfur and phosphorus, and you have accounted for approx. 100% of all biological mass. [See this site.](http://www.tetonnm.com/pics/IndependentSamplePages/1-893441-42-3.pdf)
