In the mid-twentieth century, controls were introduced to reduce air pollution and as the air quality improved tree trunks became cleaner and lichen growth increased. Once again the normal pale Peppered Moths were camouflaged and the melanic forms were more noticeable. Now the situation in urban areas has again become the same as in the countryside, with normal pale Peppered Moths being far more common than the melanic forms. So natural selection has been seen to work in both directions, always favoring the moth that is best suited to the environmental conditions. The same thing has been observed throughout Europe and the USA.
What variation of the moth is favored after clean up?
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Answer:
In the mid-twentieth century, controls were introduced to reduce air pollution and as the air quality improved tree trunks became cleaner and lichen growth increased. Once again the normal pale Peppered Moths were camouflaged and the melanic forms were more noticeable. Now the situation in urban areas has again become the same as in the countryside, with normal pale Peppered Moths being far more common than the melanic forms. So natural selection has been seen to work in both directions, always favoring the moth that is best suited to the environmental conditions. The same thing has been observed throughout Europe and the USA.
What variation of the moth is favored after clean up?
In the mid-twentieth century, controls were introduced to reduce air pollution and as the air quality improved tree trunks became cleaner and lichen growth increased. Once again the normal pale Peppered Moths were camouflaged and the melanic forms were more noticeable. Now the situation in urban areas has again become the same as in the countryside, with normal pale Peppered Moths being far more common than the melanic forms. So natural selection has been seen to work in both directions, always favoring the moth that is best suited to the environmental conditions. The same thing has been observed throughout Europe and the USA.
What variation of the moth is favored after clean up?
In the mid-twentieth century, controls were introduced to reduce air pollution and as the air quality improved tree trunks became cleaner and lichen growth increased. Once again the normal pale Peppered Moths were camouflaged and the melanic forms were more noticeable. Now the situation in urban areas has again become the same as in the countryside, with normal pale Peppered Moths being far more common than the melanic forms. So natural selection has been seen to work in both directions, always favoring the moth that is best suited to the environmental conditions. The same thing has been observed throughout Europe and the USA.
What variation of the moth is favored after clean up?
In the mid-twentieth century, controls were introduced to reduce air pollution and as the air quality improved tree trunks became cleaner and lichen growth increased. Once again the normal pale Peppered Moths were camouflaged and the melanic forms were more noticeable. Now the situation in urban areas has again become the same as in the countryside, with normal pale Peppered Moths being far more common than the melanic forms. So natural selection has been seen to work in both directions, always favoring the moth that is best suited to the environmental conditions. The same thing has been observed throughout Europe and the USA.
What variation of the moth is favored after clean up?
Answer:
If the suitable environment conditions can be sustained for a sufficiently long period of time in the urban areas then the pale peppered normal moths may become the dominant form whereas the melanic moths which were dominant earlier in the polluted environment will now gradually become recessive and may even disappear.
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