FOSSIL - These are traces of organisms that lived in the past and were preserved by natural process or catastrophic events., COMPARATIVE ANATOMY - It is the study of the similarities and differences in the structures of different species., EMBRYONIC DEVELOPMENT - The portion of the life cycle that begins just after fertilization. Many organism have similar embryo supporting the idea of common ancestor., GENETIC INFORMATION - The organism which are similar in structure and also possess similarity at the biochemical level could probably have a common ancestor.,

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