Aclient has been diagnosed with osteomyelitis and admitted to the hospital. the client's fever persists throughout most of the day but returns to normal at least twice a day. which pattern of fever is this client displaying?

This would be an intermittent fever pattern. Intermittent fevers are changeable, but at least once in each 24 hour period they will return to normal. If it were a fever pattern that never returned to normal and varied a few degrees either way, that would be a remitting fever. If the temperature always stays higher than normal with little to no variation, that is a sustained fever pattern. If it were on or more fever episodes over several days with at least one day of normal body temp in between each episode, this would be relapsing fever.

The direction a chemical reaction occurs is represented by an arrow 

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.