The theory of evolution is one of the most fascinating scientific discoveries of all time. It describes how organisms evolve over time and adapt to their environment.

While the theory has been around for centuries, it wasn’t until the 19th century that it gained widespread acceptance among scientists. Today, there is a vast amount of biochemical evidence that supports the theory of evolution.

Biochemical Evidence

One of the most compelling pieces of evidence for evolution comes from biochemistry. Biochemistry is the study of the chemical processes that occur within living organisms. Scientists have found that all living things, from bacteria to humans, share many biochemical similarities.

Genetic Code

One example is genetic code. All living things use DNA to store genetic information, and this DNA is made up of four different nucleotides: adenine (A), thymine (T), cytosine (C), and guanine (G). The order in which these nucleotides appear in DNA determines an organism’s traits.

Scientists have found that the genetic code is nearly identical across all living things. For example, humans share 99% of their DNA with chimpanzees. This similarity suggests that we share a common ancestor and evolved from a common biological origin.


Another example of biochemical evidence comes from proteins. Proteins are large molecules made up of amino acids, and they perform many essential functions within living organisms.

Scientists have found that many proteins are similar across different species. For example, hemoglobin, which carries oxygen in our blood, is nearly identical in humans and chimpanzees. This similarity suggests a common ancestry and evolution over time.


In conclusion, biochemical evidence strongly supports the theory of evolution. The genetic code and protein structures are near-identical across different species, suggesting a common ancestry and gradual evolution over time. These findings have helped to solidify the scientific consensus that evolution is a fact, and not just a theory.