Biology Crossword

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Across
  1. 2. The theory produced by Cuvier that states natural disasters that occur all throughout history, causes the extinction of an organism or species
  2. 5. When there is no gene flow between populations and new species evolve
  3. 6. The gradual development of a species over time
  4. 9. A group of organisms similar in features, capable of reproduction
  5. 11. The process by which an organism ceases to exist
  6. 12. observable change in the allele frequencies of a population over generations
  7. 15. The movement of alleles between populations
  8. 16. The study of fossils
  9. 18. A theory by Hutton. It states that the laying down of soil results from a slow process that happened over a long period of time
Down
  1. 1. The process by which better adapted organisms survive and reproduce
  2. 3. The adjustment of an organism, used for benefit
  3. 4. The ability to be passed from offspring to another
  4. 7. A relative measure of success of an organism
  5. 8. The remains or impression of a prehistoric organism that has been petrified
  6. 10. The study of geographical distribution of plants and animals
  7. 13. Species that evolve in response to changes in eachother
  8. 14. A group of organisms of a species located in an area
  9. 17. collection of alleles found in all of the individuals of a population