Discuss two evidences of evolution that help to identify evolutionary relationship between apparently different species.
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The organs that have same basic origin but different functions in different species are known as homologous organs. For example, the wings in bat and limbs of a man are originally same but one helps in flying and the other helps in holding or gripping. Some homologous organs do not have any function in one species but functional in other species. For example, appendix is non functional for human but in herbivores it is functional. These existences of homologous organs prove that there is a relationship between apparently different species like bat and humans.
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