What did gregor mendel contribute to science?
a. he developed the punnet square
b. he described the results of genetic crosses (i think its this one idk for sure)
c. he named alleles
d. he named the gene
asap!

C he named the alleles. Gergor Mendel contribute to scince.

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.

Dnaa living organsimcreation from organic chemicals