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.
RNA, which stands for ribonucleic acid stores and transmits genetic information that is vital for the manufacture of proteins. It carries this information from DNA, which is housed inside the cell nucleus, to the ribosomes. These can be found in the cytoplasm and are the 'factories' which make the proteins. Inside the nucleus RNA transcribes the genetic information by producing a complimentary nucleic acid strand - a copy of a DNA sequence. When it reaches the ribosomes the information is translated to produce a protein.