Select the correct answer.
which observation did researchers make in studies on separated twins?
a.
separated twins develop traits that differ according to the environments in which they are raised.
b.
separated twins tend to have the same behavioral characteristics, regardless of environment.
c.
although separated twins share behavioral traits during their early development, the environment might suppress such traits later.
d.
environmental factors play a more dominant role than genes do in shaping an individual's behavioral traits.
e.
certain physical traits of separated twins differ due to environmental influences.

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.