Leaf Sample Type Illumination Level Oxygen Concentration Change Data (ppm) Elapsed Time (s) Oxygen Change Rate (ppm/s) Sun-Adapted 100% 19.78 ppm 40.0s 19.78 ppm/s
Shade-Adapted 100% 12.00 ppm 40.0s -12.00 ppm/s

Using your results for change in oxygen concentration as a reference, discuss whether your results confirm research findings about differences in the amount of chlorophyll production for sun-adapted and shade-adapted leaves

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.

The answer is one amu.