There are three types of survivorship curve: i, ii, and iii. a survivorship curve plots: a. number of individuals in a cohort that survive to age x b. number of individuals who survive from age x-1 to age x c. the number of individuals that do not survive to age x

it would be heredity

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.