Across
- 3. The process where organisms with helpful traits survive and reproduce more successfully.
- 5. Differences in genes among individuals in a population.
- 9. An environmental factor that affects survival and reproduction.
- 11. A well-tested explanation supported by evidence
- 13. The molecule that carries genetic information.
- 14. A characteristic of an organism.
- 18. The struggle among organisms for limited resources.
- 19. The collection of fossils that shows how life has changed over time.
- 20. Ancestor An earlier organism from which different species evolved.
- 21. A group of the same species living in the same area.
- 23. An organism's ability to survive and reproduce.
- 24. The change in populations of organisms over time
- 25. Body parts that are similar because they came from a common ancestor.
- 26. Reproduction involving two parents that increases genetic variation.
Down
- 1. Similarities in embryos that suggest common ancestry.
- 2. The ability of bacteria to survive antibiotics due to genetic changes.
- 4. A diagram that shows evolutionary relationships among organisms.
- 6. Name The two-part name used to identify a species.
- 7. The study of similarities and differences in body structures.
- 8. A section of DNA that controls a trait.
- 10. When all members of a species die out.
- 12. A change in DNA that can create new traits.
- 15. An inherited trait that helps an organism survive and reproduce.
- 16. A group of organisms that can reproduce and have fertile offspring.
- 17. The preserved remains or evidence of an ancient organism.
- 22. A trait passed from parents to offspring.