The main difference between obsessive-compulsive personality disorder (OCPD) and obsessive-compulsive disorder (OCD)
is that
people with OCPD know their disorder is irrational
people with OCD know their disorder is irrational
OCPD is an anxiety disorder consisting of disturbing thoughts
OCD is a mood disorder consisting of disturbing behaviors

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.

Heya dear here is ur answer..it called stomata..

Mitochondrian would be the correct answer