Adaptations Biology Review

1234567891011121314151617181920212223
Across
  1. 2. selection where one extreme phenotype is favored over another
  2. 7. selection where both extremes are favored and can lead to the development of two separate species
  3. 9. how well an organism can survive and reproduce in its environment
  4. 11. process where humans breed a species for a specific trait or characteristic
  5. 14. the process of change over time
  6. 17. change in allele frequencies due to chance within a population
  7. 18. structures that have lost their use through evolution
  8. 19. the study of how organisms develop
  9. 20. a branching diagram that shows cladistic relationships between a number of species
  10. 22. an ancestor shared by two or more lineages
  11. 23. different physical features in organisms that do not have a common ancestor yet they serve the same function
Down
  1. 1. allele frequencies change when some organisms move to a new area
  2. 3. similar physical features in organisms that share a common ancestor yet have completely different functions
  3. 4. selection against both extremes that strengthens the average trait
  4. 5. process where organisms with the best fitness survive and reproduce
  5. 6. development of a new species that must be able to interbreed and have offspring that can reproduce
  6. 8. distinctive fossils used to establish and compare the relative ages of rock layers and fossils
  7. 10. developed a theory of evolution through common ancestors
  8. 12. states that layers on the bottom will always be older than layers above them
  9. 13. preserved remains or traces of ancient organisms
  10. 15. an organism with a backbone or spinal column
  11. 16. change in allele frequencies due to random chance
  12. 21. any heritable characteristic that increases an organism's ability to survive and reproduce