Peppered moth natural selection

In 1848 near the centre of Manchester

In 1900 in English cities

During the Industrial Revolution

In 1952 at Oxford University

Burning coal for fuel in factories

Genetic mutation in moths

Natural selection

Bird predation

The darkening of moths over time in polluted forests

The process of burning coal in factories

The genetic mutation causing dark moths

The survival advantage of light moths

They were an example of natural selection

They changed color due to chemicals in smoke

They evolved due to genetic mutation

They were unaffected by pollution

Dark moths live longer in polluted forests

Light moths live longer in polluted forests

Dark moths live longer in clean forests

Light moths are unaffected by pollution

Birds were twice as likely to eat light moths on dark tree trunks

Birds were twice as likely to eat dark moths on dark tree trunks

Birds were equally likely to eat light and dark moths

Birds preferred moths with genetic mutations

The number of dark moths dropped

The number of dark moths increased

The number of light moths dropped

The number of light moths remained constant