Why do identical twins separated at birth show DIFFERENCES as seen in the pictures? A. Their DNA changed because of the different environments they lived in.

B. Different genes were turned on or off because of he different environments they lived in.

B. Different genes were turned on or off because of the different environments they lived in.

Explanation:

Your DNA does not change but it can turn on some parts and off others depending on your enviroment.

B. Different genes were turned on or off because of he different environments they lived in.

Explanation:

The identical twins separated at birth show different genes were turned on or off because of he different environments they lived in.

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.