Biology

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