How are ecological relationships important to ecosystems? how could ecosystems be affected if these relationships did not exist?

Their important

Explanation:

Because with out them the ecosystems will fall apart because each organisms in the ecosystems relationships with each other effect the popular in the ecosystems rapidly and could mess up the flow if of ecosystems if the relationships didn't exist

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.