Quiz Essay Example | Topics and Well Written Essays - 750 words - 1

Quiz - Essay Example Breeders who cross-breed animals to increase the occurrence of a desirable trait often encounter a noticeable increase in lethal genes. Why? Lamarcks ideas on evolution were adopted by some Russian scientists. Their textbooks asserted that a wheat plant could be made cold-hardy by conditioning in cold storage, or that workmen who develop strong muscles would produce children who would be born stronger. In this way of thinking, which of the major premises of evolution by natural selection was violated? In the case of the peppered moths in England, when Kettlewell set up cameras to document that more white or black moths were eaten by birds on clean or sooty trees, he was observing which factor involved in evolution by natural selection? Disruptive selection is described in Chapter 19 of the text with the case of British land snails. In the grassy fields, the light-banded snails escape bird predators. In the darker forest, the dark snails survive and the light-banded snails are eaten. As long as the snails continue to cruise across the British landscape mating at the same season, why doesnt this â€Å"disruptive selection† eventually lead to two separate