Evolution

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Across
  1. 8. – Major biological changes over long time periods
  2. 9. – Shared predecessor from which different species evolved
  3. 11. – A harmful change in DNA that reduces fitness
  4. 12. – Small-scale changes in a population's gene frequencies
  5. 14. – When a few individuals start a new population in a new location
  6. 17. – Birds Darwin observed with varied beaks suited to different diets
  7. 19. – Change in allele frequencies in a population over time
  8. 20. – Humans breed for specific traits
  9. 22. – The ultimate source of genetic variation
  10. 25. – Proposed that life changes and species are not permanent
  11. 27. – Method of dating fossils using decay of radioactive isotopes
  12. 28. – Non-genetic traits that aren’t passed on
  13. 29. – Inherited trait that enhances survival and reproduction
  14. 30. – The ship that took Darwin around the world
  15. 31. – Nature favors beneficial traits
  16. 32. – Concept where only the best-adapted organisms survive and reproduce
  17. 33. – Preserved remains or traces of ancient organisms
Down
  1. 1. – Differences in DNA among individuals in a population
  2. 2. – Structures with no clear function but existed in ancestors
  3. 3. – A DNA change that has no effect on survival or reproduction
  4. 4. – A group of organisms that can breed and produce fertile offspring
  5. 5. – Similar structures from a common ancestor
  6. 6. – Gene pool reduction due to a natural disaster
  7. 7. – Unrelated species evolve similar traits
  8. 10. – All the alleles in all individuals of a population
  9. 13. – Darwin’s book published in 1859
  10. 15. – Genetic characteristics that can be passed from parent to offspring
  11. 16. – Founder of the theory of evolution by natural selection
  12. 18. – An organism’s ability to survive and reproduce in its environment
  13. 21. – A genetic change that improves an organism’s fitness
  14. 23. – Evolved ability of bacteria to survive antibiotic treatment
  15. 24. – Similar traits in unrelated species due to similar environments
  16. 26. – Where Darwin studied finches and developed key ideas
  17. 28. – A physical trait that aids in survival or An action or behavior that helps an organism survive