Sete are locomotary organs of
o Leech
Earthworm
• Nereis
syron-

Many amino acids are coded by two or more nucleic acid codons. however, the probability that a specific codon (from all possible codons for an amino acid) is used to code an amino acid varies between sequences. knowing the frequency of each codon in a protein coding sequence for each amino acid is a useful statistic.

To annswer specific questions about the natural world

Punctuated equilibria;