All of the statements about bacteria are true except

The correct answer is C. Bacteria are the only group of organisms that can fix nitrogen into the soil. This is incorrect because there are eukaryotes that can do that as well. They are however simpler organisms but they can nevertheless do it, meaning that bacteria are not the only ones. Such organisms can be the Archaea.

some inherited genetic mutations can be good for the offspring, so the answer is different genetic mutations cause many forms of cancer.