Which statement best describes how Watson and Crick's model used other scientists' work to create a model of DNA? A. They used Chargaff's rule to determine that it contains ribose sugar.
B. They used Franklin's photo to determine that DNA was a double helix.
C. They used Levene's work to determine the number of base pairs in each strand.
D. They used Nirenberg and Matthei's studies to determine that DNA is made of nucleotides.

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.

There would be no evaporation so no water cycle