Across
- 6. parts of organisms that are similar in origin and structure
- 8. the difference of similarities and differences in the physical structures of living things
- 9. parts that look similar, but are passed down from different ancestors
- 10. genetic change in a population over time
Down
- 1. body parts that have no function in their present day form
- 2. the study of the growth and development of offspring from fertilization to birth
- 3. an ancestor that multiple species have in common
- 4. a diagram that shows evolutionary relationships
- 5. all known fossils in place in time
- 7. similar body structures and development are in species with many of the same genes from a common ancestor