Across
- 2. A scientist who studies plants animals and the natural world
- 6. A scientist who proposed early ideas about evolution that were mostly incorrect
- 8. Competition among organisms for limited resources
- 10. An economist who said populations grow faster than resources
- 15. Related species differ in nearby habitats based on environmental conditions
- 18. Different species live in similar environments in different parts of the world
- 20. A geologist who proposed that Earth is very old and changes slowly over time
- 22. A group of islands where Darwin made important observations about species diversity
- 23. The idea that body parts become stronger or weaker depending on use
- 24. The ability of an organism to survive and produce offspring
- 26. A natural process that explains how something works
- 27. The process where humans choose which traits will be passed on
Down
- 1. The idea that the same natural processes have shaped Earth throughout history
- 3. Forces like war famine and disease that restrict population growth
- 4. An ancient species from which multiple modern species evolved
- 5. Traits gained during an organism’s lifetime that are not inherited
- 7. Preserved remains or traces of ancient organisms
- 9. The variety of living organisms in a particular area
- 11. The ship Darwin traveled on during his five year voyage
- 12. The process by which species change over time through descent from common ancestors
- 13. A geologist who explained that Earth’s processes are the same over time
- 14. A naturalist who developed the theory of biological evolution through natural selection
- 16. Differences in traits passed from parents to offspring
- 17. Species change over long periods as shown by fossils
- 19. Increase in the number of individuals in a population
- 21. A group of organisms that can breed and produce fertile offspring
- 25. A species that no longer exists