By measuring the UV-melting curves for the DNA of two different organisms (A and B) in the same solution and concentration, we have found the following melting temperatures (Tm): Tm(A)= 70.2 C and Tm(B)=75.6 C. Which of the following is correct? a. DNA molecule B requires less thermal energy to denaturate
b. DNA molecule A has more A and T than B
c. DNA molecule A denaturates equally to B
d. DNA molecule A has more G and C than B

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.

Average growth population growth