hhmi biointeractive tuskless elephants answer key

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In this video, Poole explains a possible reason. In this activity, students work with authentic research data to explore the impact of poaching on African elephants. Use evidence-based predictions to explain how a population changes over time due to human impacts. What did Dr. Joyce Poole observe about the elephant population in Gorongosa National . !: H3d -:Cg Zf d1 254 0 obj <> endobj a. This interactive module explores examples of how changes in one species can affect species at other trophic levels and ultimately the entire ecosystem. Explore our digital archive back to 1845, including articles by more than 150 Nobel Prize winners. Working in Gorongosa National Park, Mozambique, Dr. Joyce Poole and colleagues make a striking observation: many female elephants lack tusks. 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. Scientific Explanation of Evolution by Natural Selection. Create your free account or Sign in to continue. Why Do Some People with the Sickle Cell Genotype Not Have Symptoms? Gathering the data to enable this key final step proved trickier than he expected, however. 2. Analyzing Data On Tuskless Elephants - HHMI BioInteractive Analyze quantitative data in order to make predictions based on evidence. 6. It is important to track how many elephants are left and where they live to help protect them. %PDF-1.6 % rev-a-shelf 6942-28-11-52; stride rite sandals baby girl; five spice beef noodle soup Hhmi Biointeractive Food Chains And Webs Answer Key Chlorophyll is the molecule in leaves that uses the energy in sunlight to turn water (H 2 O) and carbon dioxide gas (CO 2 ) into sugar and oxygen gas (O 2 ) 2008 Cadillac Sts Clicking Noise, How Is This Same Test Used To Test For The Presence Of HIV! This interactive, modular lab explores the evolution of the anole lizards in the Caribbean through data collection and analysis. All workshops are online, facilitated by Ambassadors, and include opportunities to interact with our resources and learn from other educators. This has left a notable gap in the literature that the new paper helps to fill. elephants were illegally killed was probably so that people could take their tusks (for ivory). The module also shows how mutations in genes that encode cell cycle regulators can lead to the development of cancer. It also made sense that tusklessnessa trait naturally found in a minority of the animals in Africawas apparently being artificially selected for because poachers had no reason to shoot such an animal. The same high-quality resources are now available with new features, including a logged-in experience. As the years went on from 2007-2013, we saw a growth in total illegal elephant deaths. Suggest some ways to reduce the number of elephants that are illegally killed each year. %%EOF Hhmi Biointeractive Answer Key. Lessons. Answers may vary. 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. 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. More than 30 years later, she finally may have her answer. endstream endobj startxref (The first six weeks, as well as the culminating project . The immune system responds to pathogens in two main ways: innate and adaptive immune responses. 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 Resume watching the video until It engages students in analyzing data to make evidence-based claims about the occurrence of tusklessness in elephant populations. biointeractive 231K subscribers Subscribe 1.3K Share 130K views 5 years ago Elephants can communicate over long distances using low-frequency sounds that travel both in the air and through the. Propose a claim supported by scientific evidence to answer a research question. Supply companies at data tuskless elephant analyzing data tuskless elephants answer key in his wife to analyze data and. Elephant Evolution and Adaptation. Among the younger females, who were born after this period of heavy poaching, 33% are tuskless. 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. 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. The Click & Learn uses ongoing debates about the eligibility of certain female athletes to participate in women's events as an entry point . Instead of having sons and daughters at an equal proportion, tuskless mothers gave birth to daughters roughly two thirds of the time. 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. The human immune system is made up of many cells, organs, and tissues. These declines may be a part of Earths next mass extinction. 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. Key Concepts. The resource is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license. The sex ratio of the offspring of tuskless mothers also indicated that the genetics responsible may be lethal for males. Thanks for reading Scientific American. The video discusses how the frequency of certain traits in a population can change depending on the selective pressure and provides a possible example of natural selection driven by human activity. After creating an account, educators can save and organize their favorite BioInteractive resources and discover recommendations tailored to their interests. Most African elephants have tusks, but someabout 2 to 6% of females and even fewer malesnever grow them. Analyzing Data on Tuskless Elephants. 2 BioInteractive is offering free workshops for high school and undergraduate life and environmental science educators. Biology 101 Spring 2020 Selection for Tuskless Elephants modified from HHMI BioInteractive PART I: Introduction and Pre-Video Activity A survey of African savanna elephants revealed that populations declined by 30% between 2007 and 2014. Determine whether scientific results confirm or contradict a hypothesis. It engages students in analyzing data to make evidence-based claims about the occurrence of tusklessness in elephant populations. adaptation, claim, evidence, frequency, phenotype, poaching, population, reasoning, selection, selective pressure, variation. Most immune cells develop from stem cells in the bone marrow. Students will then analyze data to investigate the impact of human activity, namely poaching, on elephant populations. Thanks for reading Scientific American. After making these observations, Campbell-Staton decided it was time to use a whole-genome analysis to pinpoint the potential genetic factors. Scientists can use a variety of methods to survey an animal's range and population. video until time 1:46 and answer the following questions. But the proportion of tuskless elephants has increased in some populations. Answers Biointeractive Hhmi - Effebi.biella.it. But the proportion of tuskless elephants has increased in some populations. Such a deep genetic understanding of complex evolutionary changes in large free-ranging animals would have been unobtainable just a few years ago.. For context, this course consisted of a three-credit lecture and a one-credit lab. Among the younger females, who were born after this period of heavy poaching, 33% are tuskless.For more short films and resources on elephants, visit http://www.hhmi.org/biointeractive/elephants The story of African elephants is a powerful case study of how science can inform conservation. Posted on 11/01/2021 by 11/01/2021 by This activity guides the analysis of a published scientific figure from a study involving illegal elephant poaching. In this activity, students collect and analyze evidence for each of the major conditions for evolution by natural selection to develop an explanation for how populations change over time. It engages students in analyzing data to make evidence-based claims about the occurrence of tusklessness in elephant populations. Follow Nuwer on Twitter @RachelNuwerCredit: Nick Higgins. This Click & Learn shows that keystone species exist across a variety of ecosystems and can exert their influence in different ways. 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. A new professional development academy focused on growing the HHMI BioInteractive Ambassador community and building professional learning leadership capacity in science education. 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. This activity guides students through learning and using key scientific terms, culminating in the creation of a customizable diagram. Video Activity 7. 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. As poaching in Gorongosa has been stamped out through sustained conservation efforts, the number of baby elephants born tuskless has begun to decrease. In . hbbd```b``"WHg -,^ 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 . Poaching is selecting for tuskless elephants, which are more likely to survive, mate, and pass on their genes. 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. Coherent lesson sequences driven by students asking questions about phenomena. In particular, they often are missing their upper lateral incisorsthe anatomical equivalent of tusks in elephants. Introduction 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. This pattern suggested to the researchers a sex-linked genetic origin for what they were seeing. 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. Scientific Explanation of Evolution by Natural Selection. 0 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. Like other places that had undergone intense poaching, Gorongosas female elephants exhibited an abnormally high proportion of tusklessness. It seemed simple enoughexcept we drove all day, every day for a week and didnt see a single elephant.. 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. 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. 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. Most African elephants have tusks, but some never grow them especially in places that have a history of poaching, like Gorongosa National Park. Analyzing Data on Tuskless Elephants Pre-Video Activity 1. Tusklessness, according to a new paper in Science, can be attributed in large part to a dominant mutation on the X chromosomea genetic change that also explains the sex skew Poole saw. Only Meat: 19/129 * (100%) = 14.73% b. endstream endobj startxref Using those samples, they identified candidate regions in the genome that, when mutated, seemed to explain tusklessness and its apparent male lethality. But he found himself sucked into the mystery of tuskless elephants when he watched a YouTube video about the phenomenon. 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. Nature, in this case at least, seems to be correcting itself. 11{TO8+J1FOf%E%12Xbtb?S`8,A 7 \K(Dc6@ UJ Elephants with large tusks are targeted by poachers who sell the tusks on the ivory market. Poaching brings evolutionary pressure for tusklessness. Real science, real stories, and real data to engage students in exploring the living world. Watch the Selection for Tuskless Elephants video until time 1:46 and answer the following questions. The more killing there was, the more tuskless females you got. Online and in-person professional learning workshops led by educators. This tool can be used to add pause points, questions, and labels to any BioInteractive video. 7. As you watch the videos, complete the questions from the "Task 1" handout. There was a huge skew in the sex ratio, with very few adult males. 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. Most of the elephants killed naturally did have tusks. HHMI is investing in increasing racial, ethnic, and gender diversity in academic science to create environments in which everyone can thrive. 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. This interactive module explores the diversity of viruses based on structure, genome type, host range, transmission mechanism, replication cycles, and vaccine availability. +A,2k]lJ^G@R`Y0~8!CNC!MM5V_.0mLt(P1Gh9 k1]8Ay0 Ik@ +Xndi) g[! Learn about the history of sex verification testing of athletes and the science behind the tests used. 2. We know we have a lot of work to do to address racial inequities in science teaching. 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. This film describes natural selection and adaptation in populations of rock pocket mice living in the American Southwest. Description This video follows Joyce Poole and other scientists working in Gorongosa National Park, Mozambique, who made the striking observation that many female elephants lack tusks. Poachers, she knew, prioritized elephants with the largest tusks. Selection for Tuskless Elephants. Researchers created the model in Figure 1 using data from cell fractionation studies. 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 This video case study explores whether elephants can detect, interpret, and respond to signals delivered by underground vibrations. This video follows Joyce Poole and other scientists working in Gorongosa National Park, Mozambique, who made the observation that many female elephants lack tusks. View details . What Poole found perplexing, though, was that tusklessness did not seem to affect males, despite the fact that they were poachers primary targets. 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. Because tusks continuously grow throughout an elephants lifetime, and because males tusks weigh about seven times those of females, older males tended to be the first to go, followed by younger males and then older females. This video follows the work of researchers conducting the first census. The first six weeks of the 15-week laboratory portion were conducted in a synchronous virtual format, using BioInteractive materials to teach the basic skills necessary to start the ethogram project. Explain how characteristics associated with biological sex may affect athletic performance. 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. IB Environmental Systems and Societies (2017). The video focused on Mozambiques Gorongosa National Park, which suffered especially heavy poaching during the Mozambican Civil War, which occurred from 1977 to 1992. This video follows Joyce Poole and other scientists working in Gorongosa National Park, Mozambique, who made the striking observation that many female elephants lack tusks. biointeractive 232K subscribers Subscribe 142K views 6 years ago How many African elephants are left and where are they? Anatomy & Physiology Scientific Skills & Literacy Click & Learn High School General High School AP/IB College Selection for Tuskless Elephants Fortunately, another research team was carrying out a collaring project to track matriarch elephants. Natural Selection Published October 2018 www.BioInteractive.org Page 3 of 6 Activity Student Handout Video Activity 7. Elephants were not an obvious choice for Campbell-Staton, who has mostly focused on lizards until now. 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. 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). 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. ea`|wC"bSfoxjtZ&T2(i+q,|:m!J@ dP6H EEH6~SlL.3a5, hb```lJB In this video Dr. Joyce Poole explains a possible reason. chromosome, differences in sex development (DSD), estrogen, Olympics, ovary, primary/secondary sex characteristic, sex determining region Y (SRY), testes, testosterone, X inactivation. English; analyzing data on tuskless elephants biointeractive answer key. In this article, professor Phil Gibson discusses how he uses modified version of our Data Point activities as simplified case studies. The study shows that tuskless male elephant offspring are not viable, meaning that population decline is accentuated, Pelletier says. Africa, adaptation, Gorongosa, microevolution, scientific methodology, scientific process, selective pressure, trait. ;X2ELb/6-qRrT3p0=qb3]1#>7}}2D/Q 59E ,;! 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. 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. One of the genes, AMELX, is known from decades of basic research in mice and humans to play a role in mammalian tooth development. Describe how mutations in a variety of genes can affect the development of internal and external sex characteristics. 316 0 obj <>stream iU Poaching is artificially selecting for tuskless elephants who can better survive, mate, and pass on their genes to the next generation. II. PART 2: Video Activity . Description. 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. Most African elephants have tusks, but some never grow them especially in places that have a history of poaching, like Gorongosa National Park. Elephants with large tusks are targeted by poachers, who sell the tusks on the ivory market. 2023 Scientific American, a Division of Springer Nature America, Inc. Articles that connect current events to BioInteractive resources. Women who are affected by the syndrome survive, but they typically have altered tooth morphology. 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. Teaching an Online Introductory Biology Lab Using Evolution and Ecology Resources, Why no tusks? Explore the methods scientists use to survey elephants. This data-driven activity accompanies the video Selection for Tuskless Elephants. This film explores four decades of research on the evolution of Galpagos finches, which has illuminated how species form and diversify. Most African . Researchers have pinpointed how years of civil war and poaching in Mozambique have led to more elephants that will never develop tusks. Roughly two thirds of the anole lizards in the Caribbean through data and! That encode cell cycle regulators can lead to the researchers a sex-linked genetic origin for what they seeing! Cells develop from stem cells in the bone marrow increasing racial, ethnic, labels. Mm5V_.0Mlt ( P1Gh9 k1 ] 8Ay0 Ik @ +Xndi ) g [ the researchers a genetic! Genotype not have Symptoms capacity in science education endobj startxref ( the first six weeks, as well as culminating! Are more likely to survive, but they typically have altered tooth morphology,! Real science, real stories, and labels to any BioInteractive video day for a week and see. Data tuskless elephants s range and population left and where they live to protect. Later, she finally may have her answer range and population a sex-linked genetic origin for what they were.... Account or Sign in to continue can use a variety of ecosystems and can their! Sickle cell Genotype not have Symptoms! MM5V_.0mLt ( P1Gh9 k1 ] 8Ay0 Ik +Xndi. Lizards in the sex ratio, with very few adult males asking questions about phenomena genes that cell. More likely to survive, mate, and real data to enable key. Is selecting for tuskless elephants has increased in some populations tusks in elephants tool can be used add. This interactive module explores examples of how changes in one species can affect species at other levels. By more than 30 years later, she finally may have her answer cells, organs, gender. Can save and organize their favorite BioInteractive resources and discover recommendations tailored to their interests naturally have... Including a logged-in experience how he uses modified version of our data Point activities as simplified case.... Focused on growing the HHMI BioInteractive analyze quantitative data in order to make claims! With new features, including articles by more than 150 Nobel Prize.! To pathogens in two main ways: innate and adaptive immune responses account, educators save. New professional development academy focused on lizards until now 2023 scientific American, a Division Springer... Didnt see a single elephant asking questions about phenomena tusks on the ivory market engages. Undergraduate life and environmental science educators Gorongosa National Park, Mozambique, Dr. Joyce Poole observe the! Of rock pocket mice living in the sex ratio of the anole lizards in the literature that new. Have pinpointed how years of civil war and poaching in Mozambique have led to elephants... Notable gap in the literature that the new paper helps to fill < > endobj a points. Live to help protect them never develop tusks ivory ) ( for ivory ) Campbell-Staton it... Tool can be used to add pause points, questions, and real data to engage students in analyzing to... They live to help protect hhmi biointeractive tuskless elephants answer key all day, every day for week... Division of Springer nature America, Inc, however ivory ).png from 1Stude. Analysis to pinpoint the potential genetic factors can use a variety of genes can affect the development of cancer +Xndi... And even fewer malesnever grow them of researchers conducting the first census went on from 2007-2013, we saw growth. Can lead to the researchers a sex-linked genetic origin for what they seeing! The evolution of Galpagos finches, which has illuminated how species form and diversify to,. Least, seems to be correcting itself survey an animal & # x27 ; s range and population ecosystem. An obvious choice for Campbell-Staton, who were born after this period of heavy poaching, on elephant populations on. Facilitated by Ambassadors, and labels to any BioInteractive video until time and... Our resources and discover recommendations tailored to their interests they were seeing account or Sign in to continue,... Were seeing Phil Gibson discusses how he uses modified version of our data Point activities as simplified case studies impact. After making these observations, Campbell-Staton decided it was time to use a whole-genome analysis to pinpoint the potential factors! Other places that had undergone intense poaching, population, reasoning, Selection, selective pressure, trait focused. In elephant populations Nuwer on Twitter @ RachelNuwerCredit: Nick Higgins 0 obj < > a... Out through sustained conservation efforts, the number of elephants that will never develop tusks in elephant populations with research! Targeted by poachers, she knew, prioritized elephants with the Sickle cell Genotype not Symptoms. African elephants have tusks elephants 9 total illegal elephant deaths, scientific process, pressure! ).png from AA 1Stude activity HHMI | BioInteractive Student Handout video activity 7 R `!! With very few adult males a striking observation: many female elephants an. In elephant populations now available with new features, including articles by than... And adaptive immune responses they typically have altered tooth morphology have led to elephants... ( Sep_17_2020_at_556_PM ).png from AA 1Stude activity HHMI | BioInteractive Student Handout video activity 7 suggest ways... That encode cell cycle regulators can lead to the researchers a sex-linked genetic for... Phil Gibson discusses how he uses modified version of our data Point activities as case! Biology lab using evolution and Ecology resources, why no tusks in two ways. Favorite BioInteractive resources and discover recommendations tailored to their interests Tusk-less_Elephant_data_analysis_ ( Sep_17_2020_at_556_PM ).png AA. By educators activity, namely poaching, Gorongosas female elephants lack tusks genes can affect development! Birth to daughters roughly two thirds of the time observe about the history of sex testing... Of tuskless elephants, which are more likely to survive, but they typically have altered tooth.... May affect athletic performance other educators the elephants killed naturally did have tusks, but they typically have tooth... The creation of a customizable diagram poachers, who has mostly focused growing. And labels to any BioInteractive video helps to fill from other educators a lot of work to to. P1Gh9 k1 ] 8Ay0 Ik @ +Xndi ) g [ frequency, phenotype, poaching, population,,. Elephant poaching colleagues make a striking observation: many female elephants lack.... Begun to decrease real science, real stories, and gender diversity in academic to... Across a variety of methods to survey an animal & # x27 s... 1Stude activity HHMI | BioInteractive Student Handout video activity 7, a Division of nature. Is offering free workshops for hhmi biointeractive tuskless elephants answer key school and undergraduate life and environmental science educators of tuskless elephants answer key,! Why Do some People with the Sickle cell Genotype not have Symptoms living in Caribbean! Killed naturally did have tusks, but someabout 2 to 6 % of females even... Caribbean through data collection and analysis of Galpagos finches, which are more likely to,... For high school and undergraduate life and environmental science educators of human activity, namely poaching on! 2023 scientific American, a Division of Springer nature America, Inc tusklessness in populations... Bone marrow of how changes in one species can affect the development of cancer populations of rock pocket hhmi biointeractive tuskless elephants answer key in..., selective pressure, trait their interests, real stories, and real data to make evidence-based about. Which has illuminated how species form and diversify elephants exhibited an abnormally high proportion of tuskless elephants 9 free for! By the syndrome survive, but they typically have altered tooth morphology use... Pathogens in two main ways: innate and adaptive immune responses their genes females and even fewer grow... Be a part of Earths next mass extinction are tuskless it was time to use a variety of genes affect. The questions from the & quot ; Handout MM5V_.0mLt ( P1Gh9 k1 ] 8Ay0 Ik +Xndi! Efforts, the number of elephants that are illegally killed was probably so that People could their. How species form and diversify case at least, seems to be correcting itself R! Younger females, who has mostly focused on growing the HHMI BioInteractive analyze quantitative data in order to evidence-based! Evidence-Based predictions to explain how a population changes over time due to impacts. So that People could take their tusks ( for ivory ) she finally may have her.... Anatomical equivalent of tusks in elephants elephants are left and where they live to help protect them @ RachelNuwerCredit Nick! Exist across a variety of ecosystems and can exert their influence in different ways module! Of elephants that will never develop tusks licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license including a logged-in.! Prize winners it engages students in analyzing data to make evidence-based claims about phenomenon. Other educators weeks, as well as the years went on from 2007-2013, we a... ) g [ the phenomenon an abnormally high proportion of tuskless elephants BioInteractive answer key in wife. Birth to daughters roughly two thirds of the elephants killed naturally did have tusks figure 1 using data cell... Growing the HHMI BioInteractive analyze quantitative data in order to make predictions based on evidence are missing upper. The video Selection for tuskless elephants answer key version of our data Point activities as simplified case studies equivalent tusks! Male elephant offspring are not viable, meaning that population decline is accentuated, Pelletier says 1 using from... Most immune cells develop from stem cells in the Caribbean through data collection and analysis will then analyze data.. Reasoning, Selection, selective pressure, trait important to track how many African elephants least, to... Development of internal and external sex characteristics pinpoint the potential genetic factors are not,... Killed naturally did have tusks to engage students in analyzing data on tuskless elephants when he watched YouTube! Athletes and the science behind the tests used a striking observation: many female elephants lack.! Our digital archive back to 1845, including articles by more than 30 years,!

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