Which of the following is not part of the cell theory? every living thing is composed of cells. cells come from preexisting cells. cells are the basic unit and structure of all living things. every cells have a nucleus that contains genetic material.

The answer to this is Every cells have a nucleus that contains genetic material. 

options 1-3 all deals with life and how they become part of life with option 4 cells dont have genetic material (some do but others dont) so option 4 is your answer

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.