Geographical location of the forest elephant populations used to make a reference map. However, in Gorongosa National Park in Mozambique, 50% of females. Discussion Ideas Most African elephants have tusks. Researchers are still trying to … a) Provide a plausible explanation for how the frequency of tuskless elephants could increase by a process of natural selection. Labs? Published November 2018 Developing an Explanation for Tuskless Elephants Activity Student Handout 1. Discussion Ideas Most African elephants have tusks. In most elephant populations, a normal percentage of elephants born tuskless is anywhere between 3% to 4%, but by 1989, one National Park reported the tuskless elephant population to be between an alarming 9% and 25%. See what Lauren Pennock (laurenp0197) has discovered on Pinterest, the world's biggest collection of ideas. Student Handout Developing an Explanation for Tuskless Elephants INTRODUCTION Most African elephants have tusks, but typically about 6% of females in a population will never grow tusks. In Gorongosa National… We are dedicated to providing quality, curated, unique educational materials for little or no cost as part of our mission to democratize education in the United States and around the world. Developing an Explanation for Tuskless Elephants This activity builds on information presented in the video Selection for Tuskless Elephants. Free printable worksheets, powerpoints, outlines, and more, for teachers and parents in kindergarten through high school. The majority (98%) of the 174 female elephants in South Africa's Addo Elephant National Park are tuskless. Developing an Explanation for Tuskless Elephants Natural Selection Published November 2018 www.BioInteractive.org Page 3 of 6 Activity Educator Materials ANSWER KEY Task I: Information Gathering 1. poachers kill elephants for their tusks so elephants with tusks don't live long enough to reproduce thus fewer elephants with tusks and more tuskless elephants. elephants are born without tusks and their tusks never develop as adults. As might be expected, tuskless elephants were highly represented in these remaining populations (due to their lack of ivory). Why the elephant is losing its tusks (and it’s not evolution!). Elephants use their tusks to tear tree trunks, dig for water and roots. Among Asian elephants, for example, a long history of hunting for ivory—as well as removing tusked elephants from the wild for labour—likely helped contribute to higher tuskless numbers there. An increasing number of African elephants are now born tuskless because poachers have consistently targetted animals with the best ivory over decades, fundamentally altering the … h�b```f``z�����'� Ā B�@Q���K�m>%�������Q�X��Ė�P��^miq�ֲ4Y�tnʋT5�0W��S'�.�*^��916S�ӋqK�i�"�%df%�IE400(��[email protected]ٌ*�06sx9� g! the handout “Map of Africa” using the latitude and longitude values. “Because males require tusks for fighting, tusklessness has been selected against in males and very few males are tuskless. After answering all the questions, students can view their answers in a “Report” that can be printed. Students use scientific evidence and reasoning to construct an explanation of and develop an argument for tusklessness in elephant populations. by David Catchpoole. Saved from hhmi.org. But the proportion of tuskless elephants has increased in some populations. I can work in any content area but my forte is science teaching. African elephants are being born without tusks due to poaching, researchers say. The tuskless matriarchs had tuskless offspring, and today nearly all female elephants in the park lack tusks. This preview shows page 1 - 2 out of 6 pages. Without tusks, it’s difficult for the elephants to survive natural hardships. If one of the males could be the father, explain the general strategy for calculating the likelihood that he could match the offspring's DNA fingerprint by chance alone. Look up the definition of the term poaching and summarize your understanding of what it means in the space below. Homepage. The purpose of the elephant tusk is more far-reaching than an aesthetic feature. In these early times they were used to help with building due to their size. Primary definition, first or highest in rank or importance; chief; principal: his primary goals in life. All prices are NEGOTIABLE and fair, with very quick turnaround! […] Map. Saved by Kendra Joyce. elephants are born without tusks and their tusks never develop as adults. Course Hero is not sponsored or endorsed by any college or university. Poaching is to harm and hunt animals illegally to gain food, pleasure, and more. To answer this question, you, . SCIENCE Tuskless elephants may be a response to the selective pressure of poaching. �v0ͶE H+1�Q` ݭd� the growing rate of tussles elephants in Uganda is an example. Information Gathering 1. using evidence and reasoning from the previous tasks. “Elephants carry a sex-linked gene for tusklessness, so in most populations there are always some tuskless elephants,” says Poole. Elephant Evolution and Adaptation. These data are then used to test … %%EOF This short video introduces tusklessness (due to poaching) and would allow the teacher the opportunity to drive the instruction of the class to address one or more of several different performance expectations. According to recent figures, one-third of the generation of females born after the war ended never grew tusks – something that would normally only occur in 2 to 4 percent of female African elephants. Information Gathering 1. […] Map. Construct an explanation based on evidence that the process of evolution primarily results from four factors: (1) the potential for a species to increase in number, (2) the heritable genetic variation of individuals in a species due to mutation and sexual reproduction, (3) competition for limited resources, and (4) the proliferation of those organisms that are better able to survive … over 20 years old are tuskless, and 33% of females between 10 and 20 years old are tuskless. Jun 1, 2019 - Developing an Explanation for Tuskless Elephants. 255 0 obj <> endobj ;X�Ձ�2�EL�b�/6�-�q�����¼��R����r���T3p0�=�q�b�3]1�#��ы>7�}}2D��/���Q ������59E� ,�;�! (Courtesy of Eric Gaba/Wikimedia Commons) Plotting only the data for the forest elephants, students should develop a map similar to this one. A similar thing happened in Mozambique. -Male 2 is the father because he is responsible for paternal bands that the mother and fathers 1 and 3 cannot pass on to the offspring. Adult males are very rarely found without tusks. (12 pts) This data-driven activity accompanies the video Selection for Tuskless Elephants. 318 0 obj <>stream Forms of the elephant are believed to date back to 2,000 B.C. Develop an argument to answer the question “Will the trend toward increased, tusklessness in a population with heavy poaching lead to increased African elephant population sizes in, the future?” The goal of this task is for you to make a prediction about the future of these populations. (12 pts) Using a “Scientific Explanation of Evolution by, Natural Selection” chart, construct an explanation for the high incidence of tusklessness in the, . a) Provide a plausible explanation for how the frequency of tuskless elephants could increase by a process of natural selection. Study: 2 Shots of Pfizer Are 'Incredibly Effective' ... Now 98% of female elephants in Addo are tuskless, the Independent reports. Email me at [email protected] to run your ideas by me! Lessons that you cannot find on TpT? They can also add further explanation to each answer in the Report if their thinking has changed. Students use scientific evidence and reasoning to construct an explanation of and develop an argument for tusklessness in elephant populations. 2% in 1989, apparently as a direct result of selective illegal ivory hunting. KEY TERMS : variation, inheritance, natural selection, adaptation, argument, ... • Perhaps the most challenging aspect of developing an explanation for students is linking evidence to claims using scientific principles. In … Watch the first minute of The Great Elephant Census and answer the following questions. Natural Selection.org Published November 2018 Page 1 of 5 Developing an Explanation for Tuskless Elephants Activity Student Handout INTRODUCTION Most African elephants have tusks, but typically about 6% of females in a population will never grow tusks. However, in Gorongosa National Park in Mozambique, 50% of females over 20 years old are tuskless … Feb 6, 2017 - Astronomy Lessons! During a 15-year civil war, soldiers poached elephants for their meat to feed the troops and for their ivory to sell to buy more weapons. Among Asian elephants, for example, a long history of hunting for ivory—as well as removing tusked elephants from the wild for labor—likely helped contribute to higher tuskless … Analyzing Data on Tuskless Elephants. Adult males are very rarely found without tusks. Activity Student Handout Developing an Explanation for Tuskless Elephants Natural Selection.org Published November 2018 Page 2 of 5 Task I. ... • In the last part of the handout, students answer questions about the evolution of human skin color. 0 Selection of tuskless elephants The Great Elephant Census Moth mimicry: Using ultrasound to avoid bats ... Identifying the Key Genes for Regeneration Monkey Social Status and Immune Response New Laetoli Footprints and Hominin Body Size Over the past 100 or so years, the frequency of these ‘tuskless’ elephants has increased, presumably as a result of hunting. Adult, males are very rarely found without tusks. Two populations have evolved into two species when _____________. Explain your answer. In Gorongosa National… (Courtesy of Eric Gaba/Wikimedia Commons) Plotting only the data for the forest elephants, students should develop a map similar to this one. h�bbd```b``�"w�H&N�Q fg�ɟ`5�jz��� ��X�X$�^f��e��N����3���)��R���@�1y��"����A�9m v� \�`��@��=`�6��/A��f ��Z������l� "�30� 0 �r� Adult males are very rarely found without tusks. Female elephants do use their tusks, but female elephants in Mozambique are doing just fine without them, according to Long. The phenomenon of tuskless elephants can lead students to figure out many scientific concepts including: natural selection, adaptation, genetics, ecology, and human impact. CHECK OUT MY STORE to see samples of my work. (Nautilus) Learn more about the natural and unnatural history of the African elephant with our video study guide. Going tuskless doesn’t necessarily protect them from not becoming extinct. Elephants Animals Reading Animales Animaux Animal Animal Memes Elephant Dieren. Do you need worksheets? Male elephants usually grow tusks, but typically around 2%-5% have a genetic quirk that means they remain tuskless. Many experts believe that the Mammoth which is now extinct is an early form of the elephant. Why are there so many tuskless females in the Gorongosa elephant population? Oddly enough, even as poaching was banned across Africa in the 1950s, the percentage of tuskless elephants continued to increase. 2. The BEACON Center for the Study of Evolution in Action is an NSF Science and Technology Center headquartered at Michigan State University, with partners at North Carolina A&T State University, University of Idaho, University of Texas at Austin, and University of Washington. Everything from World History, to Geography, to handwriting practice printables. However, in Gorongosa National Park in Mozambique, 50% of Developing an Explanation for Tuskless Elephants Natural Selection Published November 2018 www.BioInteractive.org Page 3 of 6 Activity Educator Materials ANSWER KEY Task I: Information Gathering 1. why are tussles elephants becoming more likely to reproduce than ones with tusks. Gorongosa’s tuskless elephants developed a biological advantage as a result of the poaching. Watch the first minute o f The Great Elephant Census and answer the following questions. 2. Our website features a research blog by graduate students and postdocs, … Look up the definition of the term poaching and summarize your understanding of what it means in the space below. 292 0 obj <>/Filter/FlateDecode/ID[<035587B7358627438EA91049877A1170>]/Index[255 64]/Info 254 0 R/Length 155/Prev 375654/Root 256 0 R/Size 319/Type/XRef/W[1 3 1]>>stream It engages students in analyzing data to make evidence-based claims about the occurrence of tusklessness in elephant ... Propose a claim supported by scientific evidence to answer a research question. Developing an Explanation for Tuskless Elephants. Geographical location of the forest elephant populations used to make a reference map. (Nautilus) Learn more about the natural and unnatural history of the African elephant with our video study guide. The reason is that the tusks are of important use to the elephants. See more. I believe that there is no greater trophy in the hunting world than a pair of 100 pound elephant tusks. Poaching is the unlawful hunting or fishing of creatures on private property. Over the past 100 or so years, the frequency of these ‘tuskless’ elephants has increased, presumably as a result of hunting. . To learn more about the problems facing African elephants and their recovery in, Gorongosa National Park, watch these two BioInteractive, Scientific Explanation of Evolution by Natural Selection, . Elephants’ tusks are getting shorter—with an increasing proportion of the elephant population even being completely tuskless—and it’s widely being heralded as ‘evolution’ and ‘Darwinism in action’. The tusks speak of an ancient, elusive and dangerous beast hard won with sunburnt skin, sore legs and blistered feet from miles upon miles of tracking. “If you look at Asian elephants, females don’t have tusks at all, and depending on which population you look at in which country, most males are also often tuskless,” Poole explains. %PDF-1.6 %���� Jun 1, 2019 - Developing an Explanation for Tuskless Elephants. Hunting Tuskless Elephants - The Dangers, Tracking and Closing. Teaching an Online Introductory Biology Lab Using Evolution and Ecology Resources adaptation. PowerPoints? The video can also be shown without embedded questions using "Presentation Mode." Look up the definition of the term poaching and summarize your understanding of what it means in the space below. endstream endobj 256 0 obj <. Long‐term records are used to assess trends in tusklessness in this elephant population throughout the 20th century. The normal rate for African elephants is between 2% and 6%. !��:� H3�d -��:C�g� ��ض��Zf d�1��� endstream endobj startxref Teachers, scroll down for a quick list of key resources in our Teachers Toolkit. the handout “Map of Africa” using the latitude and longitude values. 2. “The key explanation is that in Gorongosa National Park, the tuskless elephants were the ones which eluded poaching during the civil war and therefore passed this trait onto many of their daughters. Elephant tusks are important for obtaining food and water, and essential to male elephants for competing for mates, so one might expect strong natural selection for having tusks. Developing an Explanation for Tuskless Elephants Natural Selection Published November 2018 Page 2 of 5 Activity Student Handout Task I. SCIENCE Tuskless elephants may be a response to the selective pressure of poaching. Teachers, scroll down for a quick list of key resources in our Teachers Toolkit. 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