A reasearcher must only measure one variable at atime,and using a scientific control group gives reliable baseline data to compare their results with.
The answer is B. Carbon atoms can bond to other carbon atoms. In fact, carbon has four electrons to form four bonds with other atoms, including carbon. Carbon is the most common and used element in the world because it makes up all living things. All four main macromolecules also contain carbon.
I think it would be D hope this helps
Answer:
Hi! so the answer is decomposition.
Explanation:
If you are looking at the graph and go to the carbon source labeled B and you look at the arrow to here soil organic matter points to you can see that it points to decomposition. Also because I took the test and got it correct. I hope you can mark me as brainleast. thank you :)
