1 the set of exogenic (physical, chemical and biological) processes that alter the physical and chemical state of rocks at or near the earth's surface.  intensity of most weathering decreases with depth, because variations in temperature and moistures decrease with depth.
A gene is a segment of nucleic acid that contains the information necessary to produce a functional product, usually a protein. Genes consist of a long strand of DNA (RNA in some viruses) that contains a promoter, which controls the activity of a gene, and a coding sequence, which determines what the gene produces.
DNA acts as a. molecular code for making these proteins. The DNA in each gene provides. the instructions for making one protein, or. sometimes, a few related proteins. However, only about 1 /60th of the entire. genome directly codes â or provides the. instructions - for making protein. The. rest of the DNA in our genomes helps.