The blob operon produces enzymes that convert compound A into compound B. The operon is controlled by regulatory gene S. Normally, the enzymes encoded by the operon are synthesized only in the absence of compound B. If gene S is mutated, the enzymes are synthesized in the both the presence AND absence of compound B. Gene S must encode a(n):
a. inducer.
Nucleus? is that the type of answer you're looking for?<span />
Communication. I would speculate that this chemical trail left at the pathway of the ants is to serve a purpose for communication which only ants know.
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Answer:
The location of fossils in rock layers provides evidence of Earth's past landscapes
Explanation:
The hormone is called adrenaline