The left and right y-axes are in opposite directions because Multiple Choice the protein products of the A and a genes counteract each other. a high proportion of one allele of a gene indicates a low proportion of the other. mutation tends to convert one allele to another. any given individual can have one of the alleles, but not both.

Dthrough a slow process

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.

Scans the skeleton into a facial reconstruction software.