Peppered Moth Lab Report

Topics: Natural selection, Industrial Revolution, Evolution Pages: 5 (757 words) Published: March 17, 2015
The Evolution of the Peppered Moth: Lab Report

Data Table 1: LIGHT colored background
Trial #
# Black Moths Remaining
# White Moths Remaining
1

15
15
2

13
17
3

10
20
4

10
20
5

9
21

Graph 1:LIGHT colored backround

Data Table 2: INTERMEDIATE background
Trial #
# Black Moths Remaining
# White Moths Remaining
1

15
15
2

20
10
3

20
10
4

22
8
5

25
5

Graph 2:INTERMEDIATE background

Data Table 3: DARK colored background
Trial #
# Black Moths Remaining
# White Moths Remaining
1

15
15
2

20
10
3

21
9
4

23
7
5

21
9

Graph 3: DARK colored background

Analysis Questions
1. Explain how natural selection relates to “survival of the fittest” concept Natural Selection is when organisms with better adaptations live longer and reproduce in greater numbers and the concept of "survival of the fittest" is the idea that reproduction is the most important thing and the ultimate goal is to survive long enough to reproduce and pass on your genes because this means that your genes will stay in the same population. These two concepts relate because of their common idea of reproduction and the passing on of genes that better help the species to stay alive in their environment.

2. What determines whether a particular variation is an adaptation or not? A particular variation can be determined as an adaptation if you see the species with a certain variation better surviving than those without the specific variation. If this is seen then it can be determined that the variation is an adaptation because it helped the species survive better in their environment.

3. What changes are evident in the graphs from Pre-Industrial Revolution (Part I) and Post-Industrial Revolution (Part III)? Use examples from your data (graphs and/or tables). Evident changes that occurred between the Pre-Industrial Revolution and Post-Industrial Revolution were the number of Black Moths remaining at the end of the five trials went up in Part III compared to Part I. For example, in Part I at the end of the fifth trial there were nine black moths remaining and twenty-one white moths remaining but at the end of the fifth trial in Part III the numbers were reversed and there were twenty-one Black Moths remaining and only nine White Moths remaining. This shows how the Black Moths increased and the aWhite Moths decreased.

4. What is the driving force that caused the number of white and black Peppered Moth in the Manchester, England population to change? The driving force that caused the number of white and black Peppered Moth population to change was the Industrial Revolution during the late 1800's when smoke particles produced by developing industry began to blacken the trunks of the trees on which the moths rested. This made the black moths blend in better with the trees so they were better protected from predators than the white moths who were more visible on the dark trees. As a result there was a change in the population and the black moth population increased and white moth population decreased.

5. Which moth had a higher fitness during the Industrial Revolution? Define fitness in your answer The black moth had higher fitness during the Industrial Revolution because it was able to survive long enough to reproduce and pass on its genes. Therefore the black moths genes will stay in the population. Overall, it was more fit than the white moth because it reproduced more and survived better than the white moth.

6. What is the independent (manipulated) variable in this activity (Parts I, II, and III)? (hint: this variable is graphed on the x-axis) The independent variable is the number of trials performed.

7. What is the dependent (responding) variable in this activity (Parts I, II, and III)? (hint: this variable is graphed on the y-axis). The dependent variable is the number of moths remaining after each trial.

Extra-credit Question:
1. What aspect of...
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