How do the plant systems work together to make this movement of liquid possible? F The roots absorb water and minerals and move them up to the stem, while the
stem moves food produced in the leaves down to the roots in tiny tubes.
G The roots anchor the plant in the soil, and the stem holds the leaves up.
H The roots absorb their own water and minerals, while the stem absorbs its water
and minerals through the leaves.
J The roots lose water vapor to the soil, and the stem loses water vapor through the
leaves.

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.