Evolution

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Across
  1. 3. A prediction that can be tested.
  2. 4. This is when animals are bred to show a desired characteristic.
  3. 6. All vertebrate animals have a ___________ which indicates they have a common ancestor.
  4. 9. A well-supported explanation of how things happen.
  5. 10. The different shapes of bird beaks are examples of ___________________.
  6. 12. A process by which populations change over time.
  7. 16. The remains or imprints of once-living organisms.
  8. 17. A prediction that can be tested.
  9. 18. This is a description of a specific relationship under given conditions in the natural world.
  10. 20. Evolution is something that happens very _______________.
  11. 22. A segment of DNA that determines the characteristics of an organism.
  12. 24. Homologous means that the organisms have similar ________________.
  13. 26. He is noted for coming up with the theory of natural selection.
  14. 28. There are _______ parts of Natural Selection.
  15. 29. This means that the "strong and fit survive."
  16. 31. This early stage of developement shows how organisms are related to one another.
  17. 32. The whale was once thought to be on _________ and in _____________.
  18. 34. A theory will ____________ become a law.
  19. 35. Annalogous means that the organisms have similar _____________.
  20. 36. All living things have a __________ _____________.
Down
  1. 1. A theory can be ______________, but a law cannot.
  2. 2. Any difference(traits) between individuals of the same speices.
  3. 5. This usually occurs when a species is unable to adapt within a changing environment.
  4. 7. A specific characteristic that an organism can pass to its offspring.
  5. 8. When a species has successful ______________ than they are well adapted and are likely to have offspring that survive.
  6. 11. Some scientists believe ____________ are direct descendants of dinosaurs.
  7. 13. The process by which organisms that inherit advantageous traits tend to reproduce more successfully than other organisms do.
  8. 14. This provides evidence about the order in which species have existed through time, and how they have changed over time.
  9. 15. Similar structures that related species have inherited from a common ancestor.
  10. 19. In England during the Industrial Revolution, what species went through Natural Selection because of the soot on the trees.
  11. 21. An inherited trait that helps an organism suvive and reproduce in its environment is an __________________.
  12. 23. When there is a change in genes, the appearance will change which is called the _______________.
  13. 25. If there was ___________ genetic variation, then it would be less likely to become extinct.
  14. 27. This is where the genetic material is stored and almost never changes throughout your lifetime.
  15. 30. Fossil ______________ shows that life on Earth has changed over time.
  16. 33. When more offspring are born than can survive.