<P> A highly conserved sequence is one that has remained relatively unchanged far back up the phylogenetic tree , and hence far back in geological time . Examples of highly conserved sequences include the RNA components of ribosomes present in all domains of life , the homeobox sequences widespread amongst Eukaryotes , and the tmRNA in Bacteria . The study of sequence conservation overlaps with the fields of genomics , proteomics , evolutionary biology , phylogenetics , bioinformatics and mathematics . </P>
what does it mean that the genetic code is highly conserved
has remained relatively unchanged far back up the phylogenetic tree , and hence far back in geological time