The blablabla operon produces enzymes that convert compound a into compound b. the operon is controlled by a regulatory gene s. normally, the enzymes are synthesized only in the absence of compound b. if gene s is mutated, the enzymes are synthesized in the presence and in the absence of compound b. gene s must encode a(n): inducer. coactivator. activator. corepressor. repressor.

Select all the correct answers. for a claim about the natural world to be considered scientific, what attributes must it have? a). it must be open to modification if new evidence doesn't completely support it. b). it must be based on scientific observations that can be repeated in a controlled setting. c). it must be applicable to future events and occurrences. d). it must be consistent with only a small portion of relevant observations or data.