Study Guide > Natural Selection: BIO 151. Henry Ford College .

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Natural Selection Go to the Natural Selection Simulation at www.biologysimulations.com Experimental Question: How does environment affect the survival of these organisms?

They are connected in various form of relationship to make the ecosystem remain functional Procedure: 1. Click on “Introduction” to read about the simulation.

2. Write a hypothesis for each environment: a. Desert Sand: My prediction for this one is there will be more grey because how the brown will blend in. b. Mountain Rock: The brown will show more because the grey will blend in with the mountain work. c. Grassland: There pretty much even so both colors have a pretty good chance of showing.

3. Run the simulation 3 times for each environment (desert, mountain, and grassland) and record your data.

4. Calculate and record averages for your data.

5. Complete the analysis and discussion questions.

Data:

554%

46%

48%

52%

56%

44%

31%

69%

57%

43%

33%

67%

56%

44%

37%

63%

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57%

43%

89%

11%

42%

58%

88%

12%

60%

40%

82%

18%

53%

47%

86%

14%

46%

54%

38%

62%

44%

56%

26%

74%

57%

43%

57%

43%

49%

51%

40%

60%

Graph: Graph the average data for each environment.

Analysis: Describe and explain the results from each environment.

In the desert the brown blend in more than on the mountain one the grey blend in. So, on both of those you couldn’t see neither of those colors on the graph. On the grassland neither of the color was shown.

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Discussion: 1. Describe factors that can cause environmental change.

I think environment change has to do with climate factors. For example, rainfall, temperature, and light wind. In such as a global warming or any that is cause by human inference cause by environmental change, such as hunting.

2. Describe industrial melanism and the effect it had on peppered moths.

It is caused by the pollution that makes the tree darker. It changes the tree from a lighter color to a darker one.

3. What could lead to different populations of the same species living in different environments?

Migration is one of the biggest one that can lead them there. However, some of the population will have to move.

4. Grizzly bears and polar bears are very closely related, so much so that they can reproduce to form hybrid offspring. Use your understanding of natural selection to describe how polar bears became a separate classification from the grizzly.

That the polar bear environment to migrating to a different area that gives them their needs of a colder environment. As these changes add up it makes them separate from the grizzlies.

5. Describe how grizzly and polar bear evolution may be affected by climate change.

Climate change might currently be threating the survival of polar bears. It is because of how easily they could be attacked. That effects their population and it starts decreasing. However, the grizzly bear will not be affected by it that much because they have self-protection.

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