Final answer:
Genes that confer resistance to antibiotics provide a selective advantage to organisms that are exposed to antibiotics.
Step-by-step explanation:
The statement is true. Genes that confer resistance to antibiotics provide a selective advantage to organisms that are exposed to antibiotics. When bacteria are exposed to antibiotics, the ones without the resistance gene are killed off, leaving only the resistant ones to reproduce and pass on their genes. This process leads to the natural selection and proliferation of antibiotic-resistant bacteria.