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.
To make a structural or functional protein, a cell needs to get genetic information from DNA out of the nucleus and into the rest of the cell, where the protein-producing machinery is located. Nucleic acids called mRNA, for messenger ribonucleic acid, form in the nucleus.They copy information from the DNA, and then leave the nucleus. Out in the cytoplasm, or liquid medium of the cell, the mRNA serves as a working template of genetic information for the protein-producing machinery.here are many different roles that nucleic acids, which include DNA and RNA, play in the human body and in other living organisms. Scientists continue to identify new and different functions of nucleic acids on a regular basis.