Across
- 3. subtle differences within a species genetic code; caused by mutations or gene recombinations
- 4. body part(s) that is similar in structure (to different organisms), but performs different functions, suggesting a common ancestor
- 5. land masses that ____ ___ (an event) resulting in speciation among animal populations
- 7. any inherited trait that gives an organism an advantage in its particular environment
- 9. individuals in a population that have a variation which givens them an advantage in their environment are more likely to survive and ....
- 10. any environmental factor that results in a "struggle for existence"
- 13. the best evidence to support Darwin's theory of evolution
- 15. body part(s) that are not similar in structure, but have the same function - indicates the organisms do NOT share a common ancestor
- 16. a trait that is passed down to offspring through genetics
- 17. Darwin's theory on evolution stating that species change over time caused by advantageous traits being passed from parent to offspring
- 18. an early form of an organism from which later forms descend
Down
- 1. a change in the genetic material of an organism
- 2. more offsprings are produced that can survive the environment
- 6. fossils that show the stages of evolution that occurred between an ancestral organism and its modern day descendants - aka the "middle fossil"
- 8. a segment of DNA that relates to a specific trait or function of an organism
- 10. the evolution of new species from an existing species (through the isolation of the species)
- 11. part of Darwin's theory of evolution that states that individual organisms with a particular adaptation are most likely to survive long enough to reproduce (passing the adaptation to its offspring)
- 12. human wisdom teeth, the appendix, and the hind legs of whales are examples of...
- 14. what is needed for speciation to occur