Across
- 3. an organism which is the shared ancestor of two or more different descendant groups of organisms
- 6. the study of the growth and development of offspring from from fertilization to birth
- 8. parts that look similar, but are passed down from different ancestors
- 9. a diagram that shows evolutionary relationships
- 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 similarities and differences in the physical structures of living things
- 4. parts of organisms that are similar in origin and structure
- 5. an incomplete record of all known fossils and place in time
- 7. species that inherited many of the same genes from a common ancestor would have similar body structures and development