Which articulations allow for greatest range of motion? O synovial joints because they allow for the greatest flexion, extension, and rotation
O cartilaginous joints because they cushion and protect the joints from injury
O muscular joints because they have the muscles to provide the motion
fibrous joints because they contain tendons and ligaments for flexibility

a plastic spoon that has a temperature of 78° f is placed into a bowl of soup that has a temperature of 84° f. which of these correctly describes what will happen?

energy as heat moves from the soup to the spoon.

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.

i think the answer is a.keratin is the pigment responsible for skin color.