Across
- 2. When new individuals immigrate to a population or individuals emmigrate from a population. They carry their gene with them.
- 4. Anatomical features similar in structure but different in function due to species adapting to different environments. Evidence of a common ancestor.
- 5. Anatomical features similar in function but different in structure. NOT evidence of a common ancestor.
- 10. All of the alleles in a population that code for inherited physical traits
- 11. A group of organisms belonging to the same species
- 12. Any trait that helps an organism survive and reproduce
- 13. When a random chance event is so drastic that it decimates a population and changes its genetic makeup drastically.
- 15. Another word to describe diversity or differences in a population
- 16. Humans and other species have similar embryos when they're a few weeks old. This is evidence we may have descended from a ____.
- 17. The remains of an organism that used to live on Earth.
Down
- 1. Anatomical features present in organisms that no longer serve a purpose.
- 3. How successful an organism is at reproducing
- 6. The idea that individuals who have better adaptations for their environment will survive and reproduce more than others
- 7. A random chance event that changes the genetic makeup of a population
- 8. A random change in DNA that has the possibility to affect the expression of physical traits
- 9. Two organisms are in the same _____ if they can reproduce with eachother and make a fertile offspring
- 14. Change over time in a population's inherited physical traits