Evolution and Geographic Time Crossword

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Across
  1. 1. The number one instinct of all animals that are suited well enough to survive.
  2. 6. Mascot of the Mesozoic Era.
  3. 8. _____________ structures that have different structures with similar functions (not closely related)
  4. 10. The current Era we are in right now.
  5. 15. Geological Time can be broken into four _________.
  6. 16. Darwin’s main idea within evolution that says those organisms that are best suited for their environment will survive to reproduce.
  7. 19. Adaptation of a porcupine.
  8. 20. Any inherited trait that increases an organism’s chance of survival.
  9. 21. Mascot of the Precambrian Era.
  10. 22. Evolution cannot be considered a fact because we cannot be 100% certain it occurred. However, we do have a large amount of evidence to support this idea. Therefore evolution is considered a __________________.
  11. 24. Eras can be broken into ___________.
  12. 28. Most fossils are found in ____________ rocks.
  13. 31. Adaptation of a beaver.
  14. 34. Example of a Vestigial structure in a human.
  15. 36. Scientist believe that modern organisms evolved/descended from ____________ ones. (Look in notes)
  16. 37. Example of analogous structures would be a ____________ wing and a ______________ wing.
  17. 38. Organisms that survive to reproduce will pass on their ______.
  18. 39. The differences in the tortoises of the Galapagos Islands.
Down
  1. 2. The change in organisms over a long period of time.
  2. 3. Structures that multiple organisms have that are built the same but have different functions to better allow that organisms a chance of survival.
  3. 4. Adaptation of a giraffe.
  4. 5. An example of homologous structures are a ______________ arm and ______ wing.
  5. 7. Mascot of the Cenozoic Era.
  6. 9. Mascot of the Paleozoic Era.
  7. 11. Any ancient remain of life.
  8. 12. The difference in the finches that Darwin observed on the Galapagos Islands.
  9. 13. The main difference between modern and ancient horse was the structure of their _______.
  10. 14. Darwin noticed that organisms were very similar with small differences to better help them fit their __________________.
  11. 17. Scientist who traveled around the world collecting specimens to help support his idea of evolution.
  12. 18. The adaptation of the finches was based off of what they _____.
  13. 23. Example of a vestigial structure in a whale.
  14. 25. Organisms that are more closely related have more ______ in common.
  15. 26. The organisms that survive according to Darwin’s idea of natural selection.
  16. 27. Even though we look much different than a chicken or turtle when born, we look extremely similar in _________________________.
  17. 29. The longest Era in geological time.
  18. 30. Two of the main organisms that Darwin observed on the Galapagos.
  19. 32. Earth is approximately 4.5 _________ years old.
  20. 33. Structures that organisms possess but no longer have a purpose.
  21. 35. The group of islands that Darwin gathered much of his data from.