The key to understanding how evolution occurs is identifying and understanding n
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The key to understanding how evolution occurs is identifying and understanding natural selection. Which of the following naturalists came up with the idea of natural selection in their attempts to understand evolution? Check all that apply Alfred Russel walace Charles Darwin Jean-Baptiste Lamarck The reason that natural selection causes evolution, or change in a species over time, is outlined by a few basic observations. These observations, or principles, construct a logical argument that this list summarizes. Basic Principles of Natural Selection Populations show a variation in traits Under certain circumstances, some traits might be better adapted than others. Organisms with the best-adapted traits survive to have more young. Over time, the best-adapted traits become more and more common in the population 1. 2. 3. 4. The following table lists several steps in a scenario in which change is occurring in a population due to natural selection. Based on the four principles of natural selection, choose the number of the natural selection principle in the right-hand column to match each of the given steps. (Note: The steps of the scenario have been shuffied out of order.) Principle of Natural Selection Step in Scenario A new type of predatory hawk migrates to the area of the rain forest where the birds live. This type of hawk is able to easily see the more-colorful male birds. The less-colorful male birds are more camouflaged, and the hawks cannot easly see them. Colorful male birds are often caught and eaten by the hawks, while the less-colorful birds more often escape, which allows them to breed with the females. After many years, the population of male birds in the area consists almost entirely of less-colorful birds. In a population of tropical birds, some males are more colorful than other males.Explanation / Answer
Charles Darwin
The sequence will be
1. In a population of tropical birds, some males are more colorful than other males.
2. A new type of predatory hawk migrates to the area of the rainforest where the birds live. This type of hawk is able to see the more colorful male birds. The less colorful male birds are more camouflaged and hawks cannot easily see them.
3. Colorful male birds are often caught and eaten by the hawk, while the less colorful birds more often escape which allows them to breed with the females.
4. After many years the population of male birds in the area consists almost entirely of less colorful birds.
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