According to modern evolutionary theory, genes responsible for new traits that help a species survive in a particular environment will usually
A) Decrease rapidly in frequency
B) Not change in frequency
C) Increase in frequency
D) Decrease gradually in frequency

It would be 232.4242

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.