IN COLLECTION

Peppered Moths Lab

Year

# of Light Moths Captured

# of Dark Moths Captured

2

537

112

3

484

198

4

392

210

5

246

281

6

225

357

7

193

412

8

147

503

9

84

594

10

56

638

1. Using a line graph (you should have 2 lines) graph the above data on the back of this sheet.

2. What preys on peppered moths? _________________________________________________

3. If the bark on the trees is dark and the moths that rest there are light, what might happen to the moths?

4. What could have caused the first few moths to change from a light variety to a dark variety?

5. What event caused the trees in England to turn from light to dark?

6. Which variety of moth increased over the 10-year period? ______________________________

7. Looking at your graph, what trends do you notice? What may have caused these trends?

8. How does this example relate to our study of natural selection? How could natural selection be a mechanism (a way) for evolution?


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