How Is Biochemical Evidence Used to Support the Theory of Evolution?


Vincent White

The theory of evolution has been a hotly debated topic for centuries. While many people believe in it, there are still some who remain skeptical.

One of the ways in which scientists support the theory of evolution is through biochemical evidence. In this article, we will explore how biochemical evidence is used to support the theory of evolution.

What Is Biochemical Evidence?

Biochemical evidence refers to the study of biological molecules such as proteins and DNA. These molecules carry genetic information from one generation to the next and are responsible for determining an organism’s traits. Scientists can compare the genetic makeup of different organisms to determine how closely related they are.

Proteins and Amino Acids

One way in which scientists use biochemical evidence is by analyzing proteins and amino acids. All living organisms use the same 20 amino acids to build proteins. However, the order in which these amino acids are arranged determines what type of protein is produced.

Scientists can compare the amino acid sequences of different proteins to determine how closely related two organisms are. The more similar their amino acid sequences, the more closely related they are believed to be.

For example, humans and chimpanzees share 99% of their DNA sequence, which indicates that they share a common ancestor.

Genetic Mutations

Another way in which scientists use biochemical evidence is by studying genetic mutations. Mutations occur when there is a change in an organism’s DNA sequence. Some mutations can be harmful or lethal, while others may have no effect at all.

However, some mutations can be beneficial and provide an advantage to an organism in its environment. Over time, these advantageous mutations can become more common within a population, leading to evolutionary change.

Scientists can study genetic mutations within populations over time to determine how they have evolved and changed over generations.

The Phylogenetic Tree

The phylogenetic tree is a diagram that shows the evolutionary relationships between different organisms. It is based on the analysis of biochemical evidence and other data.

The phylogenetic tree shows how different organisms are related to one another and how they have evolved over time. It is often used by scientists to study the evolution of different species, including humans.


In conclusion, biochemical evidence is an essential tool that scientists use to support the theory of evolution. By analyzing proteins, amino acids, genetic mutations, and other data, scientists can determine how closely related different organisms are and how they have evolved over time. The use of biochemical evidence has helped to provide a wealth of information about the origin and evolution of life on Earth.