Charcot-marie-tooth is a muscular wasting disease that affects 1 in 2,500 people. Researchers have discovered that this occurs when a large gene on the short arm(p-arm) of chromosome number is 17 makes a new copy of itself. what kind of chromosomal mutation is this? duplication

deletion

translocation

inversion

Confused on question what should we be answering

Where are they though?

C) to ensure each new cell has an exact copy of the dna

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.