Evolution and Geological Time Crossword

3. Scientist who traveled around the world collecting specimens to help support his idea of evolution.
7. longest Era in geological time.
11. The organisms that survive according to Darwin’s idea of natural selection.
13. that are more closely related have more ______ in common.
15. Time can be broken into four _________.
18. structures that have different structures with similar functions (not closely related)
19. Two of the main organisms that Darwin observed on the Galapagos.
20. of the Mesozoic Era.
21. The group of islands that Darwin gathered much of his data from.
26. An example of homologous structures are a ______________ arm and ______ wing.
27. of a Vestigial structure in a human.
31. Any ancient remain of life.
33. The main difference between modern and ancient horse was the structure of their _______.
34. of the Paleozoic Era.
35. The differences in the tortoises of the Galapagos Islands.
36. The change in organisms over a long period of time.
37. 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 __________________.
38. Adaptation of a beaver.

1. is approximately 4.5 _________ years old.
2. The number one instinct of all animals that are suited well enough to survive.
4. current Era we are in right now.
5. Any inherited trait that increases an organism’s chance of survival.
6. Structures that multiple organisms have that are built the same but have different functions to better allow that organisms a chance of survival.
8. The difference in the finches that Darwin observed on the Galapagos Islands.
9. Organisms that survive to reproduce will pass on their ______.
10. can be broken into ___________.
12. believe that modern organisms evolved/descended from ____________ ones. (Look in notes)
14. Structures that organisms possess but no longer have a purpose.
16. Even though we look much different than a chicken or turtle when born, we look extremely similar in _________________________.
17. of analogous structures would be a ____________ wing and a ______________ wing.
22. of the Cenozoic Era.
23. of the Precambrian Era.
24. Adaptation of a porcupine.
25. The adaptation of the finches was based off of what they _____.
28. Darwin’s main idea within evolution that says those organisms that are best suited for their environment will survive to reproduce.
29. Darwin noticed that organisms were very similar with small differences to better help them fit their __________________.
30. of a vestigial structure in a whale.
32. Adaptation of a giraffe.