Common Ancestory

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Across
  1. 6. A change in DNA sequence
  2. 9. Change in a species over time
  3. 13. Humans choosing traits to reproduce desired offspring
  4. 16. A group of organisms that can breed and produce fertile offspring
  5. 17. External factors that affect an organism’s survival
  6. 19. Genetic material that determines traits
  7. 20. Formation of new species
Down
  1. 1. Body parts with similar functions but different structures
  2. 2. A trait that helps an organism survive and reproduce
  3. 3. Process where the fittest survive and pass on traits
  4. 4. Remains or traces of organisms from the past
  5. 5. Body parts with similar structures but different functions
  6. 7. Struggle between organisms for limited resources
  7. 8. Chronological collection of fossils showing change over time
  8. 10. Body parts that have lost their original function
  9. 11. An ancient organism from which later species evolved
  10. 12. When populations are separated and can’t interbreed
  11. 14. Differences in traits among individuals of a species
  12. 15. Study of embryos and their development
  13. 18. When a species no longer exists