Explain why muscle cells and nerve cells have the same dna if they are in the same person but have different structures and functions.

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.

When scientist examine data such as historical documents, they are using the "scientific methods"