Its important to use a range of case studies to help students understand evolution in the natural world. Natural selection and the peppered moth scientists have observed natural selection in action in multiple types of animals, plants and microorganisms. Then use a separate sheet of paper to answer the questions that follow. A portion of this lesson is available as an interactive activity for computer or tablet. You have one minute to eat as many moths as you can. Industrial revolution genetic changes natural selection. Peppered moth reading chester upland school district. Displaying top 8 worksheets found for peppered moth simulation answers. The soot discoloured and generally darkened the surfaces of trees and rocks. The light gray version used to be far more common, but researchers observed that between 1848 and. One of his difficulties in demonstrating the theory, however, was the lack of. Students will examine data from the historical peppered moth experiment and answer several analysis questions and create a graph of the data.
Refer to the definition of natural selection on the first page of your packet peppered moths are evidence of natural selection over a. It is safe to do so and it will allow the graphics to run. Natural selection virtual lab peppered moth simulation objective. In the last 50 years, most industrial countries have significantly reduced their pollution. A wonderful activity that shows how different camouflage leads to selective predation and so to a change in the population. Understanding evolution by natural selection the role of mutation. Natural selection is one of the ideas suggested by charles darwin to explain evolution. Start studying natural selection at work peppered mothspeppered moths. During this time, pollution from factories filled the forests, coating trees in a layer of sootturning white trees black. Evolution by natural selection leads to adaptation within a population. This teaching activity uses a simple example of ducks crossing the road to challenge students understanding of evolution. Modern evolution theory states that if the frequency of genes in a population changes over time, then the population is evolving. A species of moth in england called the peppered moth is found in two varieties.
Depending on whether you choose to hunt in a preindustrial or postindustrial forest you will find either the dark moth or the light moth easier to catch. Charles darwin accumulated a tremendous collection of facts to support the theory of evolution by natural selection. Natural selection of the peppered moth during the industrial revolution in 19thcentury england is an example of an outlier in the study of evolution. Some of the worksheets for this concept are peppered moth simulation, natural selection work, lab peppered moth simulation, lab peppered moth simulation, natural selection in peppered moth populations, natural selection teacher handout, peppered moth graph, peppered moth simulation. The peppered moth as an example of evolution by natural selection this exercise is based on grant, b. Natural selection in peppered moths displaying top 8 worksheets found for this concept some of the worksheets for this concept are peppered moth reading, natural selection work, peppered moth simulation, lab peppered moth simulation, work the selection process, natural selection teacher handout, darwin 2009 natural selection, class copy peppered moth. There is incontrovertible evidence for this example of natural selection, which happens very quickly in our own lifetime, inside our bodies. See what impact eating more light or dark moths has on moth population. The peppered moth case study described above is an example of directional selection. In birds it can be the color of its feathers, the shape of its beak or the strength of its song. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
Confer an advantage for example the peppered moth mutation which made moths dark in colour. Today, in some areas, 90% or more of thepeppered moths are dark in colour. Powered by create your own unique website with customizable templates. This is a classic simulation lab linking student prior knowledge about natural selection as a mechanism for evolution to our study of kettlewells moth experiment. What are the natural predators of the peppered moth. A classic example of natural selection is the case of the peppered moth, made famous by the british scientist, bernard kettlewell. A how natural selection changed the color of peppered moths b how the industrial revolution improved the lives of workers c how charles darwin devised his theory of natural selection d how many species that have roamed the earth have become extinct 3. The reference above links directly to the article on the journals website. I ask the students to get a computer and navigate to edmodo, where i have posted the peppered moths guided notes sheet. This is a great way to reinforce the concept of natural selection as the population sizes of two peppered moths increase and decrease as the environment changes. Explain how natural selection causes populations to change background. Peppered moth simulation answers worksheets learny kids.
In this simulation, you must download or update adobe. Natural selection is still at work in the peppered moth. An excellent teaching example of darwinian evolution in action michael e. Natural selection student handout the young scientist program.
Worksheets are peppered moth lab, lab peppered moth simulation, peppered moth simulation, peppered moth simulation, natural selection in peppered moth populations, lab peppered moth. The peppered moth story was, at least until recently, a key demonstration of natural selection used in almost every textbook of evolution. Answer the following questions using the information provided. Natural selection peppered moth data analysis by beverly.
Their light wings are peppered with small dark spots. A fullyresourced lesson which is designed for gcse students and includes an informative lesson presentation 29 slides and question worksheets. Using the results from the graph below, describe how the peppered moth is evidence of natural selection over a short period of time. Tutt explicitly linked peppered moth melanism to natural selection. Simulate changes in moth population due to pollution and predation, and observe how species can change over. The evolution of the peppered moth is an evolutionary instance of directional colour change in the moth population as a consequence of air pollution during the. During the day, peppered moths rest on tree trunks and branches. Natural selection of antibiotic resistant bacteria. It is one of the best known examples of evolution by natural selection, darwins great discovery, and is often referred to as darwins moth. How is the peppered moth evidence of natural selection. Natural selection of color morphs in the peppered moth, biston betularia explain. Evolution by natural selection takes place over many, many generations. Students track the changes of the peppered moths appearance over time and connect this case to the concepts of natural selection.
Add an optional name in the box below to appear on the print summary. Displaying all worksheets related to peppered moth lab. Parallel rise and fall of melanic peppered moths in america and britain. Selection file type icon file name description size revision time user. Discuss them in pairs and decide the order of the statements check your answers. Gcse questions to help understand evolution by natural selection. Be sure to answer each question using your best writing skills. While there is strong circumstantial evidence that differential bird predation is the main agent of selection, the evidence is only circumstantial. This lesson explores the theory of evolution by natural selection. The case of the peppered moth provides irrefutable proof of biological evolution through the process of natural selection. Natural selection at work peppered mothspeppered moths. The term evolution by natural selection does not refer to individuals changing, only to changes in the frequency of adaptive characteristics in the population as a whole. Natural selection and the peppered moth types of camouflage whale evolution. The dark moths have the dominant gene for wing scale color and are either dd or dd.
This activity is not intended to recreate the peppered moth example, but rather uses the example of the peppered moth to illustrate the basic principles of population genetics. Natural selection and adaptations peppered moth activity. To illustrate the principles of natural selection and population genetics. From the outset multiple causes have been suggested for changes in melanic gene frequency in the peppered moth biston betularia and other industrial melanic moths. The lesson can be easily differentiated by altering or changing the questions and if the cut and stick activity takes too long you can shade the moth in before. To illustrate how natural selection can produce shifts in allele frequency within a population teacher notes.
You will analyze one example natural selection in peppered moths. Natural selection based on camouflage, illustrated by the peppered moth. Why were the original peppered moths protected from predators. You must also read and complete each section of the packet before getting to the actual simulation. The peppered moth biston betularia is a common moth found in europe. Year light peppered moths captured, counted, and released by researchers dark peppered moths captured, counted, and released by researchers 1 556 64 2 537 112 3 484 198 4 392 210 5 246 281 6 225 357 7 193 412 8 147 503 9 84 594 10 56 638 analysis. The selection strategies that increase genetic diversity include diversifying selection, frequencydependent selection, and balancing selection. A simple activity which can be used for either ks3 or gcse to help students understand how adaptations within the peppered moth species provides evidence towards natural selection. The case of the peppered moth biston betularia is a commonly reported example of the. Industrial melanism is a term used to describe the adaptation of a population in response to pollution.
When the coloration in the environment of the peppered moth changed, the population of moths changed in form over time. Activity sheets of natural selection evolution bbsrc. Natural selection in peppered moths worksheets kiddy math. They can also add a picture to describe what is happening at each stage. Which of the two theories matches darwins theory of evolution. It is also relevant to health aspects of the curriculum. All living things inherit traits from their parents. Natural selection teaching resources the science teacher. Peppered moth, biston betularia, species of european moth in the family geometridae order lepidoptera that has speckled blackandwhite wings.
A scientific explanation of moth colouration was only published in 1896, 14 years after darwins death, when j. Industrial melanism in the peppered moth, biston betularia. One example of rapid industrial melanism occurred in populations of peppered moths in the. Clipart and elements found in this pdf are ed and cannot be extracted and used outside of this file without permission or license. At the time, this experiment was essential to the discussion and debate about natural selection. Melanism has appeared in the european and north american peppered moth populations. Since then, tons of soot have been deposited on the country side around industrial areas. As predicted by the theory, the number of dark moths are dropping as the forests become cleaner. Peppered moth an activity in natural selection peppered moths are common insects living in england, europe and north america.
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