The number and location of bones of many fossil vertebrates are similar to those in living vertebrates. this is evidence in support of which of the following concepts?
a. lamarck's tendency towards perfection
b. common descent
c. analogous structures
d. the inheritance of acquired traits

Vertebrates are defined as they consist  of a backbone or spinal column including mammals, birds, reptiles, amphibians, and fishes.
therfore
The number and location of bones of many fossil vertebrates are similar to those in living vertebrates.So evidence in support of common descent .
hence the right answer is b. common descent

According to edgenuity, the answer is c.

Answer:

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

explanation:

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.