More than 30 years later, she finally may have her answer. Most African elephants have tusks, but some never grow them especially in places that have a history of poaching, like Gorongosa National Park. An audio descriptive version of the film is available via our media player. Suggest some ways to reduce the number of elephants that are illegally killed each year. chromosome, differences in sex development (DSD), estrogen, Olympics, ovary, primary/secondary sex characteristic, sex determining region Y (SRY), testes, testosterone, X inactivation. 255 0 obj <> endobj HS-LS1.A, HS-LS1.B, HS-LS3.B, HS-LS4.ASEP6, SEP8, IST-1.P, IST-1.J, IST-2.E, IST-4.A; SP1, SP2, SP4, SP6, IB Environmental Systems and Societies (2017), Teaching an Online Introductory Biology Lab Using Cellular and Molecular Biology Resources, Desktop App - macOS 10.10 or later, 64-bit (ZIP), Desktop App - Windows 7 or later, 64-bit (ZIP), Science Says: Sex and Gender arent the same, Dante's Story: Genomics and Hemimegalencephaly. Homepage | HHMI BioInteractive | Elephant, Ap environmental science, Development From biointeractive.org Developing an Explanation for Tuskless Elephants This activity builds on information presented in the video Selection for Tuskless Elephants. Use evidence-based predictions to explain how a population changes over time due to human impacts. Students use scientific evidence and reasoning to construct an explanation of and develop an argument for tusklessness in elephant populations. endstream endobj startxref Scientific Explanation of Evolution by Natural Selection. This Click & Learn shows that keystone species exist across a variety of ecosystems and can exert their influence in different ways. Scientists . Using Pooles database, they further confirmed that, with a single exception, female elephants with two tusks had never been observed to have a tuskless baby. Answers may vary. Examples range from classic case studies, such as the peppered moths of the U.K. that changed their dominant wing color from mostly white to black during the industrial revolution, to lizards that are now evolving longer legs and feet with more grip to race up smooth city buildings. The module also shows how mutations in genes that encode cell cycle regulators can lead to the development of cancer. Look up the definition of the term poaching and summarize your understanding of what it means in the space below. endstream endobj 255 0 obj <. To prevent his AP Environmental Science students from having "problem fatigue," Florida educator Scott Sowell focuses on how environmental solutions are developed, justified, implemented, and evaluated. It engages students in analyzing data to make evidence-based claims about the occurrence of tusklessness in elephant populations. Genetics Evolution Scientific Skills & Literacy Scientists at Work High School General High School AP/IB College Lessons. hbbd```b``"WHg -,^ Researchers have pinpointed how years of civil war and poaching in Mozambique have led to more elephants that will never develop tusks. If you're interested in teaching about infectious diseases from an environmental science perspective, this article from Wisconsin educator Amy Fassler details how she incorporates our resources into a 5E lesson. Scientists are trying to determine the genes involved in tusk development and how variations in these genes can lead to tusklessness. Video Activity 7. Answers may vary. To learn more about the problems facing African elephants and their recovery in Gorongosa National Park, watch these two BioInteractive Scientists at Work videos: the first minute of The Great Elephant Census and all of Selection for Tuskless Elephants. endstream endobj startxref Typically, though, such studies focus on small creatures that have large population sizes and fast generational turnovers because changes they undergo are easier to observe in real time. In this study, scientists used DNA profiling to determine where ivory seized from poachers had originated. !: H3d -:Cg Zf d1 a. Only Meat: 19/129 * (100%) = 14.73% b. Scientific Explanation of Evolution by Natural Selection. This study is among the first to show that selective killing of large vertebrates can have a direct impact on evolutionary change, says Fanie Pelletier, an ecologist at the University of Sherbrooke in Quebec, who co-authored a perspective piece in Science about the research. Natural Selection Published October 2018 www.BioInteractive.org Page 3 of 6 Activity Student Handout Video Activity 7. This activity guides the analysis of a published scientific figure from a study involving illegal elephant poaching. Its something I had puzzled over for so long, says Poole, co-founder and scientific director of ElephantVoices, a nonprofit science and conservation organization. Poole, who is a co-author on the new paper, combed through old natural history films and amateur videos to estimate the prevalence of tusklessness prior to the war. II. The more killing there was, the more tuskless females you got. This video follows the work of researchers conducting the first census. Africa, adaptation, Gorongosa, microevolution, scientific methodology, scientific process, selective pressure, trait. This interactive, modular lab explores the evolution of the anole lizards in the Caribbean through data collection and analysis. This video case study explores whether elephants can detect, interpret, and respond to signals delivered by underground vibrations. Analyzing Data on Tuskless Elephants Pre-Video Activity 1. II. %%EOF Knowledge awaits. This activity explores images of a coral bleaching event, which serve as phenomena for learning about marine ecosystems, human impacts, and climate change. rev-a-shelf 6942-28-11-52; stride rite sandals baby girl; five spice beef noodle soup 2. This is a beautiful study that is certain to become a textbook example of how intense human exploitation of wildlife can rapidly change the natural world, says Jeffrey Good, a mammalian evolutionary geneticist at the University of Montana, who was not involved in the research. Shane Campbell-Staton of Princeton University, co-lead author of the new paper, has spent his career studying the ways that humans force such evolutionary changes across the tree of life. Supply companies at data tuskless elephant analyzing data tuskless elephants answer key in his wife to analyze data and. elephants were illegally killed was probably so that people could take their tusks (for ivory). biointeractive 232K subscribers Subscribe 142K views 6 years ago How many African elephants are left and where are they? Create your free account or Sign in to continue. Key Concepts. Not all downloadable documents for the resource may be available in this format. Tuskless mothers, on the other hand, had about an equal proportion of daughters with or without tusks (or, in some cases, with a single tusk). Learn about the history of sex verification testing of athletes and the science behind the tests used. Hhmi Biointeractive Answer Key. For context, this course consisted of a three-credit lecture and a one-credit lab. In 1989, when elephant ethologist Joyce Poole began carrying out surveys of three East African elephant populations to understand the impact that heavy poaching was having on them, she quickly noted several stark trends. Thanks for reading Scientific American. Ordered sequences of BioInteractive resources for teaching a course, unit, or lesson. In this activity, students engage in key science practices that scientists used to figure out ecosystem dynamics in the Serengeti. Additionally, disruptions to the same region of the X chromosome in humans is associated with a syndrome that usually causes male fetuses to abort in the second trimester. IB Environmental Systems and Societies (2017). %PDF-1.6 % By watching segments of this video, students will follow the analyses and discoveries of Joyce Poole, a scientist who has studied elephants for many years. In . In this article, professor Phil Gibson discusses how he uses modified version of our Data Point activities as simplified case studies. Most African elephants have tusks, but some never grow them especially in places that have a history of poaching, like Gorongosa National Park. 2 Poaching tips scales of elephant evolution, The Genetics of Tusklessness in Elephants, Using Genetic Evidence to Identify Ivory Poaching Hotspots, Using Data to Investigate Elephant Evolution, Developing an Explanation for Tuskless Elephants, Moth Mimicry: Using Ultrasound to Avoid Bats. Poachers, she knew, prioritized elephants with the largest tusks. Explore our digital archive back to 1845, including articles by more than 150 Nobel Prize winners. The story of African elephants is a powerful case study of how science can inform conservation. This activity guides the analysis of a published scientific figure from a study that measured species population declines on a global scale. The added information provided at pause points within the animation How We Get Our Skin Color allows for a richer exploration of the topic of human skin structure and function. |U#62RF>^/,[4@[S5MT3M_q+; u* Explain how the selective pressures on a population may impact the frequencies of phenotypes. Meat Only: 19 b. Tusks Only: 75 c. Meat and Tusks: 27 4. Most African elephants have tusks, but some about 2% to 6% of females and even fewer males never grow them. Resume watching the video until 7. The Click & Learn uses ongoing debates about the eligibility of certain female athletes to participate in women's events as an entry point for students to learn the processes involved in human reproductive development. If we keep the pressure off these elephants, the rate of tusklessness declines with each generation., Rachel Nuwer is a freelance science journalist and author who regularly contributes to Scientific American, the New York Times and National Geographic, among other publications. Elephants with large tusks are targeted by poachers who sell the tusks on the ivory market. endstream endobj 256 0 obj <. Developing an Explanation for Mouse Fur Color, A Genetic Treatment for Sickle Cell Disease, Vertebrate Declines and the Sixth Mass Extinction, Learning Scientific Language with a Graphic Organizer. Howard Hughes Medical Institute Statistical Data Explorer. 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. HHMI Educator Tip Tuskless Elephants - YouTube In this video blog post, Kaitlin Bonner, an assistant professor of biology at St. John Fisher College in Rochester, NY, explains how she uses. Discover world-changing science. Perri Carr describes how she uses BioInteractives elephant resources to teach concepts ranging from biotechnology to genetics to ecology and conservation. Among the younger females, who were born after this period of heavy poaching, 33% are tuskless. We were going to drive around at Gorongosa, spot an elephant, see if the elephant had tusks or not, wait for the elephant to poop and then collect its DNA, he says. a. Campbell-Staton was just as perplexed by this as Poole had been, and he soon struck up a collaboration with her and other elephant ecologists. 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