Structurally and biochemically similar individuals share common characteristics and are considered homologous, indicating a close evolutionary relationship. Homologous DNA and fossils provide evidence of evolutionary relationships by linking past and present species. Similar embryonic development in chickens and humans also suggests an evolutionary relationship.

2. Related IndividualsShare Common Characteristics Homology

3. Similarities? Related? Structural Homology

4. Biochemical Homology: Homologous DNA = Close Evolutionary Relationship

5. Fossils link the past to the present

6. Embryonic Development Chicken Human Evolutionary Relationship?