Coevolution

                 Part 1:  Go to the website:

http://www.necsi.edu/projects/evolution/co-evolution/co-evolution_intro.html

Directions:  Read about coevolution and answer the following questions.

                                       Coevolution

1. How do organisms benefit through coevolution?

2.  How do adaptations play a role in coevolution?

3.  How can coevolution lead to a new species?

Click on the “Predator-Prey Relationships” at the bottom of the page.

                            Predator Prey Relationships

1.  How do predator and prey evolve together? Use natural selection in your      answer.

2.  How is coevolution seen in the polar bear and seal pup relationship?

3.  How did the zebra and lion relationship lead to increased speed in both animals?

4.  How do the Galapagos tortoise and the cactus show coevolution?

5.  How do predator-prey relationships lead to keen senses?

Click on the “Mutualistic Relationships” at the bottom of the page.

                              Mutualistic Relationships

1.  Why would mutualistic relationships lead to coevolution of two organisms?

2.  Explain how the oxpecker and zebra (or rhinoceros) show coevolution. a) Explain the benefits to both organisms in your answer.

3.  Define pollination.

4.  Explain the relationship of the bee and the flower.  How would the relationship lead to coevolution?  Use natural selection in your answer.

 Click on the “Parasitic Relationships” link at the bottom of the page.

                                 Parasitic Relationships

1.  What is a parasitic relationship?

2.  How do fleas benefit from their hosts?  How are the hosts affected?

3.  How do tapeworms benefit from their hosts?  How are the hosts affected?

4.  How do barnacles benefit from their hosts?  How are the hosts affected?

5.  How could parasites evolve to benefit from their hosts without killing them?  Use natural selection in your answer.

6.   How do parasites and hosts coevolve?

7.   How do parasitic relationships cause organisms to coevolve with other organisms other than the parasite?

                           Part 2: Watch Video

Directions:  Watch video about commensalism and answer the following questions.

                                          Commensalism

1.  What two organinsms have a commensal relationship in this video?

2.   Explain a commensal relationship.

3.   Explain how these two organisms have coevolved.

                                             Mimicry

Directions:  Watch the video about the Monarchs and Viceroys, then click on the webpage and answer the following questions. 

 

http://www.enature.com/articles/detail.asp?storyID=600

1.  Explain how the Monarch and Viceroy have coevolved.

2.  Predict what would happen to the Viceroy population if the Monarch butterfly population began to change in appearance.

                           Part 3:  Watch Video:

Directions:  Watch the video and answer the following questions.

 

                    Evolution: “The Evolutionary Arms Race”

1.  What type of relationship do the ants and the fungus have? Would they be able to survive without one another?  Explain using coevolution.

2.  How do the ants protect the fungus?

3.  Why would many plants in the tropics be poisonous to animals?

4.  What were the ants covered in?

5.  What relationship do the ants and the bacteria have?

6.  Explain why the mold has not evolved antibiotic resistance.  Use coevolution in your answer.