Across
- 2. Study of structural similarities and differences between different species.
- 3. Preserved remains or traces of ancient organisms that provide evidence of past life forms.
- 5. Similar structures in different organisms indicate a common ancestor.
- 6. Non-functional or reduced structures that were once functional in ancestral species.
Down
- 1. Study of similarities in early developmental stages among different species.
- 4. Analysis of genetic sequences to determine evolutionary relationships.