1-The body is composed of chemical elements. : The body of the living beings is composed of chemicals which are required to be determined by determining the chemical makeup of the organisms. This can be achieved by the knowledge of chemistry.
2-Chemical reactions occur in the body.: The chemical reactions occurring in the body can be responsible for helping the body to perform functions necessary for the survival of the organism.
3- Chemistry studies matter and energy.: The chemistry studies the matter which is the composition of the living being and the energy produced and released by the organism.
Thus all these steps suggests that the chemistry is important for the biology.
There are four principles at work in evolution—variation, inheritance, selection and time. These are considered the components of the evolutionary mechanism of natural selection.
