Natural selection and the peppered mothsI. Enter to the following website and read all the slides containing information...
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Natural selection and the peppered moths

Published on: Mar 3, 2016
Source: www.slideshare.net


Transcripts - Natural selection and the peppered moths

  • 1. Natural selection and the peppered mothsI. Enter to the following website and read all the slides containing information about the peppered moths: http://www.techapps.net/interactives/pepperMoths.swf 1. Play the animation of “A bird´s eye view of natural selection” in dark forest and light forest. Record the percentage of moths (dark and light) in each type of forest in the following table at the end of the animation. % Dark moths % Light moths Light forest 36 64 Dark forest 53 47 2. Explain how the color of the moth increases or decreases its chances of survival depending on the color of the trees. In the dark forest is easier to a predator to eat the light moths because the trees are dark and the light moths are easier to see. In the light forest is easier to a predator to eat the dark moths because the trees are light and the dark moths are easier to see. 3. Explain the concept of “natural selection” using moths as an example. A moth had a mutation in his DNA and he pass it to his offspring, sothey start turning darker than they were and the dark moths take advantage in the dark forests. 4. Imagine there were no predators in the forest. Would the colors of the moths change over time? Support your answer No, because there´s no need to change of color if there is not predators.

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