Answer:
C but see below.
Explanation:
e. The paper clip will likely fall off because it wasn't attached to the nail long enough to be magnetized.
The same answer would apply to the nail. It likely was not held onto the magnet long enough to pick up a magnetic force that would be strong enough to overcome the gravitational force pulling on the clip.
Of the four answers you have given us, I would agree with C. But as I've argued above, the real reason is likely there.
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.
Answer: First water is a liquid. Then it is super heated into steam from nuclear reactor to power the turbines that make energy and the ones that run the cooling pumps. Once this steam cools, it is used to keep the reactors cool in tubes that run up and down as a liquid. Not all of the water makes it. Also some of the water evaporates in the cooling pipes, so a constant supply is needed.
Explanation:
The water in the pumps keeps the reactor rods cool. The water slowly boils to an extent, so more is needed. So left-over steam is fed here. Water is not wasted. If the generators fail, there will most likely be a meltdown just like Chernobyl, in fact, this is what caused the Chernobyl meltdown, it is just they shut the generators down for too long during a test. These generators are powered by the steam. Use the answer portion. The explanation part well, you know, describes and backs-up the answer.