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5 cards from this section. Quick, good the night before a test.
Name and describe the two main forms of the peppered moth.
One looks peppered; the other looks as if it is covered in soot.
What was the selective agent that caused the change in the peppered moth population?
Who was eating the moths?
Which form of the peppered moth became common in polluted industrial areas?
Which form matched the blackened trunks?
What did soot and pollution change?
Think about the moths' background.
A student repeats a release-recapture study in two woods, releasing 400 marked moths of each form in each wood. Wood A (polluted): 100 dark and 52 pale moths are recaptured. Wood B (unpolluted): 24 dark and 50 pale moths are recaptured. (a) Calculate the percentage recaptured for each form in each wood. (b) What do the results suggest? (c) Suggest one improvement to the method. (These figures are invented for practice.)
Percentage recaptured = number recaptured ÷ number released × 100.
The peppered moth is often called "evolution in action". Explain what it shows about evolution, and discuss whether it shows the formation of a new species.
Distinguish a change in allele frequency within a species from the origin of a new species.
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