The la brea tar pits in los angeles are the site of millions of fossils from the ice age. woolly mammoths, giant sloths, dragonflies, and other plants and animals from this era have been found in these pits.
scientists at the tar pits discovered that many of the smaller animals they extracted from the pits still exist around los angeles today. but many of the larger mammals—such as woolly mammoths and saber-toothed tigers—are now extinct.
why do you think this is the case? what can scientists learn about los angeles’ climate history by studying the specimens found in these tar pits?

i won't lie i don't know so go online and ask google thats what i do

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.

the species living around the vents are especially good at dispersal.  

deep-sea vent originates on the floor of the ocean when seawater circulates through hot volcanic rocks, usually situated where the new oceanic crust is being produced.  

biological dispersal refers to the movement of species from their location of birth to their site of breeding, or from breeding site to another. similarly, the oceanic dispersal refers to the movement of the species from one land mass to another by sea crossing.