Ascientist wants to determine the effect of a new type of gasoline. he fills e car with normal gasoline and another identical car with the new gasoline. which is the control group?

a polymer is a chainlike molecule made up of small molecular units. these small molecular units are called monomers. monomers of polymer can be joined together either naturally or synthetically.  

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

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