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