The number of trout in a lake drops when the lake is polluted. the trout population later increases, but the allele frequency is different than it was before the pollution. what type of situation is this?

a. founder
b. mass extinction
c. genetic drift
d. bottleneck

If you are doing this for Apex, the answer is (D.) Bottleneck

b ti isnfornopgnoernfrof

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.