Ascientist dissects a new species of animal. if the animal’s digestive system has a single stomach with an extended small intestine, to which animal could the dissected specimen be closely related?
lion
snowshoe hare
earthworm
eagle

most community's take hundreds of years to become stable

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.