pipets are used to measure and dispense small amounts of liquids. you should draw the liquid into the pipet using your mouth.

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

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.

its b. greenhouse gasses trap uv rays for heat so that the plants stay alive.