Pale and dark peppered moths were collected and placed on pale and dark areas of bark on trees in a park in Liverpool, England (Figure 17.13). Some of the moths were predated by birds. The results of the investigation are shown in the table.

a. 40 dark moths were placed on dark bark. Calculate the number of moths taken by birds. Show your working.

b. Suggest an explanation for the differences in the numbers of moths taken by birds.

Figure 17.13

Transcribed Image Text:

Percentage of moths taken by birds Colour of moth from pale bark from dark bark pale 20 44 dark 40 15