Which is more difficult: Biology or Chemistry? Give reasons why

answer:

i would say chemistry

Explanation:

biology is the natural science that studies life and living organisms  including their physical structure chemical processes molecular interactions physiological mechanisms development and evolution

chemistry is a branch of science that involves the study of the composition structure and properties of matter often known as the central science it is a creative discipline chiefly concerned with atomic and molecular structure and its change for instance through chemical reactions

you should wear a lead protective shield when having teeth x-rays

hope i

-lavira : )

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.