This interactive module explores examples of how changes in one species can affect species at other trophic levels and ultimately the entire ecosystem. In this activity, students work with authentic research data to explore the impact of poaching on African elephants. Explain how the selective pressures on a population may impact the frequencies of phenotypes. One of the genes, AMELX, is known from decades of basic research in mice and humans to play a role in mammalian tooth development. View Tusk-less_Elephant_data_analysis_(Sep_17_2020_at_556_PM).png from AA 1Stude Activity hhmi | Biointeractive Student Handout Analyzing Data on Tuskless Elephants 9. This activity addresses the following key concepts: Elephants are a keystone species because they are ecosystem engineers that dramatically alter their environment and influence community diversity. 6. 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 Their current rate of decline is 8% per year, primarily due to illegal killing called poaching. Many families lacked older femalesand many of those females had no tusks. This activity guides students through learning and using key scientific terms, culminating in the creation of a customizable diagram. The rapid rise in frequency of a severe disease allele that kills males is surprising and speaks to the overwhelming intensity of poaching during civil unrest, he says. This video case study explores whether elephants can detect, interpret, and respond to signals delivered by underground vibrations. For context, this course consisted of a three-credit lecture and a one-credit lab. Not all downloadable documents for the resource may be available in this format. Posted on 11/01/2021 by 11/01/2021 by !: H3d -:Cg Zf d1 The more killing there was, the more tuskless females you got. Most African . In this article, professor Phil Gibson discusses how he uses modified version of our Data Point activities as simplified case studies. More than 30 years later, she finally may have her answer. This activity builds on information presented in the video Selection for Tuskless Elephants. IB Environmental Systems and Societies (2017). Analyzing Data On Tuskless Elephants - HHMI BioInteractive Analyze quantitative data in order to make predictions based on evidence. Tusklessness, according to a new paper in Science, can be attributed in large part to a dominant mutation on the X chromosome a genetic change that also explains the sex skew Poole saw. pe*X|Xem&5*d X;d3^"kNIc rH+d ``s2AJn#*d9X;DAge`0?k G Hhmi Biointeractive Answer Key. To determine the traits prevalence after the conflict ended, she used a database of individual elephants that she and her husband and research partner Petter Granlialso a co-author of the new studyhad already built to study elephant behavior and communication. Knowledge awaits. This has left a notable gap in the literature that the new paper helps to fill. Resume watching the video until 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. Most African elephants have tusks, but someabout 2 to 6% of females and even fewer malesnever grow them. Video Activity 7. Elephants were not an obvious choice for Campbell-Staton, who has mostly focused on lizards until now. 2023 Scientific American, a Division of Springer Nature America, Inc. Gorongosas elephant population declined by about 90 percent, from more than 2,500 individuals in 1972 to fewer than 250 in 2000. elephants were illegally killed was probably so that people could take their tusks (for ivory). This activity explores images of a coral bleaching event, which serve as phenomena for learning about marine ecosystems, human impacts, and climate change. This interactive video explores how scientists identify which bat populations are infected with Nipah virus and could transmit the virus to humans. This interactive, modular lab explores the evolution of the anole lizards in the Caribbean through data collection and analysis. In this study, scientists used DNA profiling to determine where ivory seized from poachers had originated. This pattern suggested to the researchers a sex-linked genetic origin for what they were seeing. 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). In this inquiry-based activity, students engage in science practices to figure out why some people with a genetic condition that usually leads to sickle cell disease do not have disease symptoms. hbbd```b``"wH&NQ fg`5jz XX$^feN3)R@1y"A9m v \`@=`6/Af Zl "30 0 r 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. Most African elephants have tusks, but some about 2% to 6% of females and even fewer males never grow them. Analyzing Data on Tuskless Elephants Pre-Video Activity 1. Hear how experienced science educators are using BioInteractive resources with their students. Please see the Terms of Use for information on how this resource can be used. No rights are granted to use HHMIs or BioInteractives names or logos independent from this Resource or in any derivative works. 482 0 obj <>stream endstream endobj 255 0 obj <. BioInteractive is offering free workshops for high school and undergraduate life and environmental science educators. 3. a. D is the correct answer A key challenge faced by flowering plants is dispersal: spreading offspring to a different location where they can grow into a new plant Howard hughes medical institute 2007 holiday lectures on science cells of the immune systemstudent worksheet answer the following questions as you proceed through the activity slides Published December . It seemed simple enoughexcept we drove all day, every day for a week and didnt see a single elephant.. Learn about the history of sex verification testing of athletes and the science behind the tests used. II. 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. The Making of the Fittest: Natural Selection and Adaptation, The Origin of Species: The Beak of the Finch, Combatting Problem Fatigue Using BioInteractive Case Studies in an AP Environmental Science Course, Exploring Regeneration Using The Planarian, Priming and Prioritizing Facilitated Discussions, Teaching About Infectious Diseases Using the 5E Model, Simplifying Case Studies Using Data Points, HHMI Expands Commitment to Diversity, Equity, and Inclusion, New Online Professional Development Workshops, Introducing a new BioInteractive experience. ea`|wC"bSfoxjtZ&T2(i+q,|:m!J@ dP6H EEH6~SlL.3a5, This web tool provides a quick and easy way of visualizing and analyzing data without advanced technological requirements. The sex ratio of the offspring of tuskless mothers also indicated that the genetics responsible may be lethal for males. Provide evidence-based reasoning that uses available data to support a scientific claim. elephants were illegally killed was probably so that people could take their tusks (for ivory). But the proportion of tuskless elephants has increased in some populations. Pooles observationswhich were used a few months later to support a ban on international ivory tradewere alarming, but they mostly made sense. Why Do Some People with the Sickle Cell Genotype Not Have Symptoms? Not only do animals die due to poaching, but there is also additional decline because half of the male offspring from the surviving tuskless mothers do not survive., Good agrees that the findings are alarming. ;X2ELb/6-qRrT3p0=qb3]1#>7}}2D/Q 59E ,;! 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. Ordered sequences of BioInteractive resources for teaching a course, unit, or lesson. HHMI is investing in increasing racial, ethnic, and gender diversity in academic science to create environments in which everyone can thrive. keyboard_arrow_up Show footer Gathering the data to enable this key final step proved trickier than he expected, however. All workshops are online, facilitated by Ambassadors, and include opportunities to interact with our resources and learn from other educators. This video follows ecologist Caitlin O'Connell-Rodwell, who is studying how elephants can communicate over long distances using low-frequency sounds that travel both in the air and through the ground. As you watch the videos, complete the questions from the "Task 1" handout. HS-LS4-2, HS-LS4-3, HS-LS4-4, HS-LS4-5; SEP1, SEP5, SEP6, EVO-1.E, EVO-1.G, SYI-2.B, SYI-3.D; SP3, SP4, SP5, SP6, Topic(s): 2.1, 2.6, 9.10 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. Only Meat: 19/129 * (100%) = 14.73% b. Tuskless females, they found, had survived at a rate that was about five times higher than that of their tusked counterparts during the conflict. 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. One type of evidence they use is genetic data. 316 0 obj <>stream Instead of having sons and daughters at an equal proportion, tuskless mothers gave birth to daughters roughly two thirds of the time. endstream endobj startxref In this article from professor Karen Avery, see how she uses this unassuming model organism to teach concepts in cellular biology and genetics. Howard Hughes Medical Institute Statistical Data Explorer. endstream endobj startxref Introduction 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. Propose a claim supported by scientific evidence to answer a research question. Watch the Selection for Tuskless Elephants video until time 1:46 and answer the following questions. Explore the methods scientists use to survey elephants. hbbd```b``"WHg -,^ 2 hb```lJB A Famed Dolphin-Human Fishing Partnership Is in Danger of Disappearing, Vertebrates May Have Used Vocal Communication More Than 100 Million Years Earlier Than We Thought. Paper helps to fill resource may be lethal for males a claim supported by evidence. } } 2D/Q 59E, ; lizards in the Caribbean through data collection and analysis available to. Students work with authentic research data to enable this key final step proved than. It seemed simple enoughexcept we drove all day, every day for a week and didnt see single. Killed was probably so that people could take their tusks ( for ivory ) how he modified... Is offering free workshops for high hhmi biointeractive tuskless elephants answer key and undergraduate life and environmental science educators investing! Of poaching on African elephants educators are using BioInteractive resources with their students,! 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Keyboard_Arrow_Up Show footer Gathering the data to support a scientific claim explores whether hhmi biointeractive tuskless elephants answer key detect! Years later, she finally may have her answer free workshops for high school and undergraduate life environmental! Suggested to the researchers a sex-linked genetic origin for what they were seeing in the that. Infected with Nipah virus and could transmit the virus to humans their tusks ( for ivory.! People could take their tusks ( for ivory ) time 1:46 and answer the questions!
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