OBJECTIVE LIFE SCIENCE
EVOLUTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Soot is a black substance that collects on a surface that comes into contact with smoke
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When coal burns, it gives off a lot of dark-colored smoke
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Predators could see the light gray peppered moths on the black trees covered by soot and easily hunt them down.
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The trees began to blacken with soot because of all of the smoke in the air from the factories.
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Detailed explanation-1: -Smoke given off by the factories threatened the survival of the peppered moth. What evidence from the text best supports this conclusion? What conclusion can be drawn from the change in the peppered moth’s coloration? Darker coloring became better for the peppered moth’s survival.
Detailed explanation-2: -In the English countryside near industrialized areas, the trees began to blacken with soot because of all of the smoke in the air from the factories. This made the light gray peppered moths much more vulnerable. Predators could see them on the trees more clearly and easily hunt them down.
Detailed explanation-3: -Tutt suggested that the peppered moths were an example of natural selection. He recognized that the camouflage of the light moth no longer worked in the dark forest. Dark moths live longer in a dark forest, so they had more time to breed. All living things respond to natural selection.
Detailed explanation-4: -What is the evidence that the peppered moth example meets this necessary condition? Natural selection has occurred in peppered moth populations. The black form of the peppered moth was very rare in England before 1850. After that date, industrialization resulted in air pollution which darkened tree trunks and branches.
Detailed explanation-5: -As the trees darkened with soot, the light-colored moths were easier to see. They were eaten by birds more and more, while the rare dark colored moths blended in better on the darker trees. This made the dark colored moths have a higher survival rate.