Biodiversity - Environmental Science

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Across
  1. 2. total number of species estimated to be on this Earth
  2. 3. species likely to become extinct
  3. 7. illegal hunting, fishing, etc.
  4. 8. span of time when a mass extinction took place
  5. 10. a living museum of the world's biodiversity
  6. 13. biggest category of organisms discovered
  7. 14. refers to the numbers of different species in an area
  8. 15. chemical that caused bird's eggs to crack
  9. 17. convention on international trade in endangered species
  10. 18. one cause of extinction
  11. 19. species that is declining
Down
  1. 1. area with high species diversity that is threatened
  2. 4. area of critical biodiversity
  3. 5. piece of DNA that codes for a trait
  4. 6. form of tourism that supports an ecologically unique area
  5. 9. refers to the different traits within a species
  6. 11. species critical to an ecosystem
  7. 12. species that are native to an area
  8. 16. birds that are endemic to Hawaii
  9. 20. species that is not native to an area(invasive)