Biology

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Across
  1. 6. useless structures that were once important to a species ancestors
  2. 9. the influence of closely associated species on each other through out evolution
  3. 11. the process of species adapting and changing over time
  4. 13. the remains or impression of a prehistoric creature casted or imprinted on a rock or sedament
  5. 14. bdoy parts that are different in structure but same in use
  6. 17. a random change in a gene
  7. 18. the study of bodily structures
Down
  1. 1. a species becoming extinct slowly
  2. 2. relating DNA found in other organisms
  3. 3. bursts of rapid change between periods of little or no change in a species
  4. 4. multiple new species arising from a common ancestor
  5. 5. extinction of a species due to a catastrophic event
  6. 7. body parts that have same structure different use
  7. 8. the stock of genes in a breeding population
  8. 10. the species in a specific area
  9. 12. non random breeding
  10. 15. a trait that allows a population to survive better
  11. 16. the study of developing embryos