B. Carbon atoms form the backbones of the organic molecules in
living things.
Explanation:
A. Carbon atoms are found in both living and nonliving things.
Other chemical elements found in organic compounds and living things are also found in nonliving things. Oxygen is found in amino-acids from the proteins which form complex organism and it is also found in the oxides which are found in rocks.
B. Carbon atoms form the backbones of the organic molecules in
living things.
The carbon atoms form carbon chains (backbones of the organic molecules) which with functional groups they become molecules that are found in the living things. Aminoacids form proteins and monozacharides form polysaccharides such as celulose.
C. Carbon atoms have equal numbers of protons and electrons.
All elements in the periodic table have the number of protons equal to the number of protons and electrons.
D. Carbon atoms form bonds with atoms of other elements.
Many elements are able to form bonds with other elements.
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