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.
The resulting bundle is called a chromosome. A Gene is a particular section of the chromosome's DNA string. There are many such sections on the DNA string-thus it contains (also calls 'codes') many genes-in humans between 500 and 4500 depending on what chromosome.One gene contains information for producing one particular protein. Gene is a particular section of the chromosome's DNA string. There are many such sections on the DNA string-thus it contains (also calls 'codes') many genes-in humans between 500 and 4500 depending on what chromosome. One gene contains information for producing one particular protein.