Across
- 4. Group of organisms that includes an ancestor species and all of its descendants.
- 5. A person who is an expert or interested in botany or zoology, especially in the field.
- 6. The evolutionary history of a group of genetically related organism.
- 8. Study of the similarities and differences in the structures of different species.
- 9. Organisms changing over time.
- 10. The process of change by which an organism or species becomes better suited to its environment.
Down
- 1. Scientist who finds and study fossils.
- 2. An organism’s relative ability to survive and produce fertile offspring.
- 3. A diagram showing evolutionary relationships within one or more clades.
- 7. English naturalist scientist who formulated a theory of evolution by natural selection.