Match each organism with the type of association it exhibits.
barnacles on the back of a whale
a stork eating a fish with its beak
ticks sucking the blood from the body of an animal
prey-predator
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parasitism
arrowRight
commensalism
arrowRight
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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.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.