Created by StemPy LabBefore industry spread in England, pale peppered moths were more common than dark ones. Around 1920 the dark form was more common. What caused the change?
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← The embryos of a fish and of a human both show slits on the sides of the neck. Haeckel said that this proves that an embryo repeats the adult stages of its ancestors. What did von Baer find?The Australian marsupials came from one ancestral stock and became many forms. A placental wolf and a Tasmanian wolf look alike. Which option names the two processes in order? →
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