evolution

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Across
  1. 4. selection organisms evolve traits useful to humans
  2. 8. time scale Division of Earth history into blocks of time distinguished by geologic
  3. 10. on how the organism’s genotype is expressed.
  4. 11. an act of describing or identifying something precisely
  5. 13. Traits often affects numerous species of organisms
  6. 17. develop from a fertilized egg.
  7. 18. Traits Feature passed to a new generation.
  8. 19. tree Diagram that shows how species are related to each other
  9. 20. process of adapting
Down
  1. 1. person who studies human history
  2. 2. dating The origin of life
  3. 3. Darwin naturalist developed theory of evolution
  4. 5. left behind by a once-living organism.
  5. 6. speciation Evolution of a new species that occurs when some members of an original species
  6. 7. combination of alleles that an individual has
  7. 9. scientist who finds and studies fossils
  8. 12. selection organisms trait better enable adapt
  9. 14. speciation Evolution of a new species that occurs without geographic
  10. 15. structures Structure that evolution has reduced in size
  11. 16. Cell parts of our in green inheritance