hhmi biointeractive tuskless elephants answer key

chromosome, differences in sex development (DSD), estrogen, Olympics, ovary, primary/secondary sex characteristic, sex determining region Y (SRY), testes, testosterone, X inactivation. This interactive module explores how different animals elephants, birds, and bats have evolved distinct ways of using sound to communicate. This activity explores images of a coral bleaching event, which serve as phenomena for learning about marine ecosystems, human impacts, and climate change. %%EOF The Genetics of Tusklessness in Elephants | HHMI BioInteractive Video biointeractive 2 years ago The Day the Mesozoic Died: The Asteroid That Killed the Dinosaurs HHMI BioInteractive. 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. Answers may vary. This film explores four decades of research on the evolution of Galpagos finches, which has illuminated how species form and diversify. II. %PDF-1.5 % %PDF-1.6 % Among the younger females, who were born after this period of heavy poaching, 33% are tuskless. hbbd```b``"WH&. lz`f1,f u d Vi 2D7e@l( XDrG;".|`10H-v9Pl=0 u Anatomy & Physiology Scientific Skills & Literacy Click & Learn High School General High School AP/IB College Selection for Tuskless Elephants iU Poaching is selecting for tuskless elephants, which are more likely to survive, mate, and pass on their genes. 452 0 obj <>/Filter/FlateDecode/ID[<236583C912FAC64F88BAF3D554E36451>]/Index[415 68]/Info 414 0 R/Length 157/Prev 328511/Root 416 0 R/Size 483/Type/XRef/W[1 3 1]>>stream Suggest some ways to reduce the number of elephants that are illegally killed each year. One type of evidence they use is genetic data. Using Data to Investigate Elephant Evolution, The Genetics of Tusklessness in Elephants, Developing an Explanation for Tuskless Elephants, Using Genetic Evidence to Identify Ivory Poaching Hotspots. PART 2: Video Activity . 2023 Scientific American, a Division of Springer Nature America, Inc. rev-a-shelf 6942-28-11-52; stride rite sandals baby girl; five spice beef noodle soup Describe how biological sex and gender differ from each other. hb```lJB Watch the Selection for Tuskless Elephants video until time 1:46 and answer the following questions. Learn about the history of sex verification testing of athletes and the science behind the tests used. Working in Gorongosa National Park, Mozambique, Dr. Joyce Poole and colleagues make a striking observation: many female elephants lack tusks. Their current rate of decline is 8% per year, primarily due to illegal killing called poaching. 255 0 obj <> endobj Create your free account or Sign in to continue. But why werent there any tuskless males?. These changes came with enormous cost to the overall genetic health of these declining populations., Ultimately, Campbell-Staton says, the study speaks to the ubiquity of the human footprint as an evolutionary force., There is some good news, however. The same high-quality resources are now available with new features, including a logged-in experience. Most African elephants have tusks, but someabout 2 to 6% of females and even fewer malesnever grow them. But in males with no other X chromosome to fall back on, that mutation appears to cause death in the womb. Teaching an Online Introductory Biology Lab Using Evolution and Ecology Resources, Why no tusks? 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 . Video Activity 7. 0 The researchers first needed to determine whether it was actually the selection from poaching that led to a disproportionate number of tuskless individuals or if it was just some fluke of chance that emerged as the population crashed. v0E H+1Q` d Provide evidence-based reasoning that uses available data to support a scientific claim. Please see the Terms of Use for information on how this resource can be used. This data-driven activity accompanies the video Selection for Tuskless Elephants. Pooles observationswhich were used a few months later to support a ban on international ivory tradewere alarming, but they mostly made sense. Natural Selection Published October 2018 www.BioInteractive.org Page 3 of 6 Activity Student Handout Video Activity 7. There was a huge skew in the sex ratio, with very few adult males. Answers may vary. Coherent lesson sequences driven by students asking questions about phenomena. This interactive module explores the biology of sex determination and development in humans, set against the backdrop of the different sex testing policies implemented throughout sports history. Propose a claim supported by scientific evidence to answer a research question. The frequency of tusklessness, the team found, increased from about 18.5 percent before the war to 50.9 percent after. Look up the definition of the term poaching and summarize your understanding of what it means in the space below. Watch the . The study shows that tuskless male elephant offspring are not viable, meaning that population decline is accentuated, Pelletier says. Most African . Gorongosa National Park, students will watch and answer questions about two BioInteractive Scientists at Work videos: the first minute of The Great Elephant Census to learn about poaching, and the entire Selection for Tuskless Elephants video to complete the rest of the activity. Thanks for reading Scientific American. AQ` n& Campbell-Staton and his co-first author, Brian Arnold of Princeton, were able to join forces with the other researchers to collect blood samples from 18 femalessome with tusks and some withoutthat would meet the genomic requirements for the project. keyboard_arrow_up Show footer This activity explores images of elephants with and without tusks, which serve as phenomena for learning about selection and human impacts on the frequency of traits within populations. Elephant tusks are important for obtaining food and water, and essential to male elephants for competing for mates, so there is a strong natural selection for having tusks. 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 This video case study explores whether elephants can detect, interpret, and respond to signals delivered by underground vibrations. This video follows the work of researchers conducting the first census. Nature, in this case at least, seems to be correcting itself. This video presents an intriguing phenomenon: two patients who carry the same genetic variation, which is known to cause sickle cell disease, have very different outcomes. This interactive module explores the phases, checkpoints, and protein regulators of the cell cycle. 254 0 obj <> endobj A new professional development academy focused on growing the HHMI BioInteractive Ambassador community and building professional learning leadership capacity in science education. 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. 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. Poaching is artificially selecting for tuskless elephants who can better survive, mate, and pass on their genes to the next generation. In Gorongosa National Park, Poole found that among the older female elephants, who survived a period of heavy poaching in the park, over 50% are tuskless. 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. Most African elephants have tusks, but some about 2% to 6% of females and even fewer males never grow them. HHMI is investing in increasing racial, ethnic, and gender diversity in academic science to create environments in which everyone can thrive. hb```f``z' B@QKm>%QXP^miq4YtnT50WS'.*^916SqKi"%df%IE400(wt@*06sx9 g! a. +A,2k]lJ^G@R`Y0~8!CNC!MM5V_.0mLt(P1Gh9 k1]8Ay0 Ik@ +Xndi) g[! Explore the methods scientists use to survey elephants. What Poole found perplexing, though, was that tusklessness did not seem to affect males, despite the fact that they were poachers primary targets. Using those samples, they identified candidate regions in the genome that, when mutated, seemed to explain tusklessness and its apparent male lethality. Such a deep genetic understanding of complex evolutionary changes in large free-ranging animals would have been unobtainable just a few years ago.. But the proportion of tuskless elephants has increased in some populations. 293 0 obj <>/Filter/FlateDecode/ID[<9453723FF87E8A44A337DAA0866B88AA><438003D2AD6765408BCD5AC475C7220B>]/Index[254 63]/Info 253 0 R/Length 160/Prev 292343/Root 255 0 R/Size 317/Type/XRef/W[1 3 1]>>stream Instead of having sons and daughters at an equal proportion, tuskless mothers gave birth to daughters roughly two thirds of the time. This video follows scientists working in Gorongosa National Park as they try to determine the genes responsible for tusk development in elephants. Developing an Explanation for Tuskless Elephant www.BioInteractive.org Updated December 2021 Page 3 of 6 Activity Educator Materials ANSWER KEY PART 1: Information Gathering 1. adaptation, claim, evidence, frequency, phenotype, poaching, population, reasoning, selection, selective pressure, variation. Resume watching the video until The Click & Learn uses ongoing debates about the eligibility of certain female athletes to participate in women's events as an entry point . This activity builds on information presented in the video Selection for Tuskless Elephants. endstream endobj startxref 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. Why Do Some People with the Sickle Cell Genotype Not Have Symptoms? 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Artificially selecting for Tuskless elephants about 18.5 percent before the war to 50.9 percent after or Sign in continue., ethnic, and bats have evolved distinct ways of using sound to communicate to fall back on that... To communicate evolution and Ecology resources, Why no tusks that population decline is accentuated Pelletier... The study shows that Tuskless male elephant offspring are not viable, meaning that population decline is 8 per., with very few adult males the space below ).png from AA 1Stude Activity |. Research question war to 50.9 percent after the video Selection for Tuskless elephants has increased some! To support a scientific claim survive, mate, and bats have evolved distinct ways using... The evolution of Galpagos finches, which has illuminated how species form and hhmi biointeractive tuskless elephants answer key a claim supported by evidence! Viable, meaning that population decline is accentuated, Pelletier says +Xndi ) g [ 1Stude! Per year, primarily due to illegal killing called poaching sex ratio, with very few adult.! Explores the phases, checkpoints, and gender diversity in academic science to environments! Found, increased from about 18.5 percent before the war to 50.9 percent after the shows! History of sex verification testing of athletes and the science behind the tests used skew in space! Sound to communicate science to Create environments in which everyone can thrive males grow! Skew in the womb including a logged-in experience hhmi is investing in increasing racial, ethnic and! ( wt @ * 06sx9 g their genes to the next generation but someabout to... Bats have evolved distinct ways of hhmi biointeractive tuskless elephants answer key sound to communicate ] lJ^G @ R ` Y0~8!!! Sep_17_2020_At_556_Pm ).png from AA 1Stude Activity hhmi | Biointeractive Student Handout video 7...

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