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Transcript
Evolution Tutorial Directions: Print this answer sheet. Using the website indicated. Read and answer the following instructions. Click the INTRODUCTION tab. 1. Evolution refers to modifications, or _______________, which eventually result in the formation of ___________ ____________. 2. What does evolved mean? ____________________________________ 3. What does extinct mean? _____________________________________ 4. How do we know that millions of organisms that lived in the past have gone extinct? _____________________ _________________________ 5. The American cougar and the African lion both share a common _________________ from the past. 6. Are all cat species related? ________ Why? _______________________ 7. Evolution works because is takes an existing structure and ____________ that structure. Click the GENES tab. 8. New individuals born in a ______________________ can potentially inherit any of the genes in the __________ __________ . 9. Gene frequency refers to how frequent a ___________ or ___________ is in a population. 10. Gene frequency can change because of __________. When the gene ____________ changes the population is ___________________. 11. Gene flow occurs when genes are able to move from __________________________________________________________ . 12. If gene flow stops, isolated populations may change enough that they can no longer ___________ ___________ __________ of the ____________ ___________________ . 13. What is speciation? __________________________________________ 14. If two populations are separated for a VERY long time, and then the two populations are later brought together, they MAY have changed so much that they can no longer ________________. 15. Why do you think the arctic fox has thick fur? ___________________________________________________________ 16. Why do you think the Gray Fox developed thin fur? ___________________________________________________________ Click the NATURAL SELECTION tab. 17. Natural selection works because nature selects ____________ that are the best for a given _______________. 18. What does traits mean? __________________ . 19. Artificial selection is not caused by nature, it is cause by ___________ . 20. What is the first principle of Natural Selection _____________________ ? 21. Why do organisms produce more offspring than needed? __________________________________________________________ 22. What is the second principle of Natural Selection __________________? 23. Why is variation important? __________________________________________________________ 24. What is the third principle of Natural Selection _____________________ . 25. Why is there competition within a species? __________________________________________________________ 26. What is the fourth principle of Natural Selection _____________________ 27. What does fitness not mean? __________________________________ 28. Why does fitness mean? _______________________________________ Click the MUTATION tab. 29. What is a mutation ? _________________________________________ 30. Are mutations usually beneficial? ________ 31. Mutations are the source of _______ _________ in a ______________ . 32. _______________ ______________ will weed out _____________ mutations and select for __________________ mutations. 33. Why does the red bug eventually thrive? ______________________ 34. In this example: The ______________ of the red allele is ___________. A change in _____________ ____________ is _______________. 35. The _____________ for white fur made it possible for the _____________ of the polar bear. 36. What causes sickle cell anemia? ________________________________ 37. What does it do to the red blood cell? ____________________________ 38. Why is the relationship of sickle cell allele and malaria? ___________________________________________________________ 39. Since malaria is wide-spread in Africa, is there a natural selection process occurring in relationship to the sickle cell allele? Explain. ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ Click the ADAPTATIONS tab. 40. Natural selection will favor ______________ that will be __________. 41. According to the text, mammals evolved from _________________. The teeth of mammals are more ________________ than the teeth of reptiles. Click the PHYLOGENY tab 42. What is phylogeny? _______________________________________ . 43. How are these relationships expressed? _______________________ . 44. All Arthropods have ________ _________ ________ joints and a _________________ body. 45. Which class of animals is the most successful? ____________________ 46. How is the reptile brain and the mammal brain different? ___________________________________________________________ 47. What is the significance of Cynognathus? ___________________________________________________________ 48. How many species of mammals are there? ________________________ 49. The wings of the bird are _______________ to the front legs of a reptile. 50. The body of a reptile is covered with scales. A bird has scales only on the _____________. Both animals have ____________. Reptiles have claws on all four legs while birds only have claws on their _________ ______. 51. What is the significance of Archeopteryx? __________________________________________________________ 52. How many species birds are there? _____________________________ 53. Can they all fly? ______ Name one: _____________________________ Click Quiz Questions Answer QUIZ QUESTIONS 1-12 in full sentences on a separate sheet of paper.