Compare and contrast: vaccines versus antibiotics mark each statement as true for either (v)vaccines or (a)antibiotics. a. work only against bacterial infections. b. work primarily against viral infections. c. immunity is provided by injecting a killed or live attenuated (weakened) type of pathogen into a person. the person’s own immune system then creates antibodies against that pathogen that keep them from becoming ill when they come in contact with it in the future. d. if used improperly, can cause bacteria to mutate and become resistant to the medication. e. work because of the types of memory cells in our immune system.

they absorb it i think

not sure

you

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.