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Biological Evolution - Example
English moth, Biston betularia:
- Two color morphs: light and dark
- 1848 dark moths <= 2% of the population
- Frequency of the dark morph increased:
- 1898 95% were dark in Manchester and other highly industrialized areas
- Why? natural selection
- Soot from factories darkened birch trees the moths landed on
- Birds could see the ligther colored moths better and ate more of them more dark moths survived
- http://www.talkorigins.org/faqs/faq-intro-to-biology.html
Notes:
Not a NEW characteristic !!!!
moth population changed from mostly light colored moths to mostly dark colored moths
moths' color was primarily determined by a single gene
change in frequency of dark colored moths represented a change in the gene pool Evolution
You must actually upload the ID poloniex api and passport photos.
increase due to natural selection. The late eighteen hundreds - England's industrial revolution. Soot from factories darkened the birch trees the moths landed on. Against a sooty background, birds could see the lighter colored moths better and ate more of them. As a result, more dark moths survived until reproductive age and left offspring. The greater number of offspring left by dark moths is what caused their increase in frequency. This is an example of natural selection.
http://www.talkorigins.org/faqs/faq-intro-to-biology.html