tale of speciation on daphne major answer key

a) Calculate the amount of PbF 2 (s) that dissolv, 1,Is there an ethical difference between gender balancing versus selecting the sex of your first child? They find that natural selection happens repeatedly, that finches hybridize and exchange genes This is an interesting tale of a small population, an immigrant, incest, and isolation. Fig. Four histograms summarize the results of this study: the average for the parents on Daphne Major in 1976, the offspring on Daphne Major in 1976, all finches on Santa Cruz in 1976, and survivors on Daphne Major in 1978. <> Students explore the case to learn about geographic and behavioral isolation which can lead to speciation. endobj dalim:psshoot:86618000-ac0f-6b85-e7a1-96d1ffff291d Students learn about a case where speciation occurred between two populations of finches. (You, You have two opportunities to invest $5,000 for 10 years: The first provides a yield of 8% annually, compounded quarterly. /T1_1 1 Tf <> Accounting. This lineage has been determined to be a new species. 128 0 obj 0 1 TD finches on the island until a drought occurred, wiping out all but one brother and sister. Genome sequencing of the immigrant identified it as a G. conirostris male that originated on Espaola >100km from Daphne. Tale of Speciation on Daphne Major < Speciation, the process by which two species form from one, involves the development of reproductive isolation of two divergent lineages.= 1. What forced brother and sister mating in the birds? "A naturalist who came to Daphne Major without knowing that this lineage arose very recently would have recognized this lineage as one of the four species on the island. How might these differences contribute to reproductive isolation? Improbable Big Birds. In 1981 a population of finches of the species Geospiza fortis lived on the Galapagos island of . Because songs are meant to attract female birds, this form of attraction will not apply to all species. It was a hybrid of two finch species from another island. 2017-03-01T16:03:22Z 8 0 0 8 187 401 Tm The brother and sister had no choice but to breed with each other (scandal!). The remarkable distance meant that the male finch was not able to return home to mate with a memberof his own species and so chose a mate from among the three species already on Daphne Major. /T1_1 1 Tf Video by Peter and Rosemary Grant, Department of Ecology and Evolutionary Biology, Image courtesy of P.R. The market for oranges is characterized by perfect com. Science Magazine Article small island of Daphne Major in the Galpagos archipelago. <>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/Type/Page>> document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Speciation on Daphne Major Big Birds Get No Love, https://docs.google.com/document/d/1KHQMro1tSabaz7T46bv0GG0HexQPCZd7tDRP83BOYW0/edit?usp=sharing, Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. 4 0 obj ET ET "We have no indication about the long-term survival of the Big Bird lineage, but it has the potential to become a success, and it provides a beautiful example of one way in which speciation occurs," said Andersson. - Processes of Evolution, - Developing an Explanation for Mouse Fur Color (HHMI), (Video 15 min) HHMI: Pocket Mouse The study comes from work conducted on Darwins finches, which live on the Galpagos Islands in the Pacific Ocean. Tale of Speciation on Daphne Major "Speciation, the process by which two species form from one, involves the development of reproductive isolation of two divergent lineages." Grant, P and Grant, R. (2009). 2017 \251 The Au\ thors, some rights reserved; exclusive )Tj The secondary contact phase of allopatric speciation in Darwin's finches. Uppsala University contributed to the content of this press release. ( )Tj endobj Unit 1 - Classification. A vs. 6. There were only two surviving descendants of that one immigrant finch, sort of like cousins of each other, basically, and they mated with each other, and that seems to have set the stage for speciation to occur. 0/0 [2] From 1975 to 1977 one of the Galapagos Islands, Daphne Major, experienced a severe drought. 6 0 0 6 79 403 Tm /T1_1 1 Tf (\(print ISSN 0036-8075; online ISSN 1095-9203\) is published by the Amer\ ican Association for the Advancement of)Tj I do not know who the original creator was. (Science )Tj -8.11398 0 Td Contemporary evolution of reproductive divergence in sympatry along a migratory divide. The offspring were also reproductively isolated because their song, which is used to attract mates, was unusual and failed to attract females from the resident species. 129 0 obj xXYoF~0@_.KT4CSDILucwfHH V~3;p| ?9_]]JEJHCt;~Es6v(##qP!p}0 &9 ss=9t9d}"t, %*GMU^v=X5`_o_%iEI pN:CBfPB!@.=f/.&8ND!E:,g9ysBs3. It came from an. Its genetic make up was, (another common Galapagos finch species). )Tj j\i-~==Op(rw]EQMyH4E5(HQ_-*P1.#*kb"f_+XAK$FxUFJeFq {vdcg8ZS#3_kX `9'p (3u_Od}uvn|TSI# !y 3|].Fh{U_JA-M0bD22}[-(U~[yTk|H mL;c 0X ?1Ar?oU]C:/^,7(a"Gq?b#QUaS L6)$Hm[ANc tPvURl2!VV{^e(^I, American Association for the Advancement of Science. Course Hero is not sponsored or endorsed by any college or university. /Im0 Do because we're too broke for chegg so you're welcome. Uywamy (cookies), dziki ktrym nasz serwis moe dziaa lepiej. x * x >= 0 2.Presume the ex. 79 0 obj How does the concept of variation of traits help to explain this? In 1981 a population of finches of the species Geospiza fortis lived on the Galapagos island of Daphne Major. Compare the histograms of the average for the parents and their offspring on Daphne Major in 1976. (Science\240)Tj /T1_0 1 Tf -0.278 0 Td Rolshausen, G., Segelbacher, G., Hobson, K. A., and Schaefer, H. M. (2009). PNAS. In 1981, Peter and Rosemary Grant, the famous husband-and-wife team of evolutionary biologists at Princeton University, had already been studying Darwin's finches on the small Galpagos island Daphne Major for nearly a decade. When geographical isolation is concerned that is called Allopatric speciation. Speciation, the process by which two species form from one, involves the development of reproductive isolation of, This is an interesting tale of a small population, an immigrant, incest, and isolation. In endogamy, the goal is always to reproduce with gametes of similar ancestry so closely related individuals of the same species would prefer to mate with each other. What kind of speciation do we normally associate with members from one population being geographically displaced to a new, smaller population? (PERMISSIONS)Tj The study tracked Darwin's finches on the Galpagos island of Daphne Major, where a member of the G. conirostris species (pictured) arrived from a distant island and mated with a resident finch of the species G. fortis.The offspring developed into a new species that the researchers call the Big Bird lineage. The males song was strange because in learning the song from the. Some birds prefer northern winter. If possible, students work together and discuss the case. A critical requirement for speciation to occur through hybridization of two distinct species is that the new lineage must be ecologically competitive that is, good at competing for food and other resources with the other species and this has been the case for the Big Bird lineage. S Investigation: Teddy Graham Lab. 8 0 0 8 187 428.99997 Tm Its genetic make up was, (another common Galapagos finch species). 0 g 6.1 https://docs.google.com/document/d/1KHQMro1tSabaz7T46bv0GG0HexQPCZd7tDRP83BOYW0/edit?usp=sharing, Here is a direct link: https://docs.google.com/document/d/1KHQMro1tSabaz7T46bv0GG0HexQPCZd7tDRP83BOYW0/edit?usp=sharing. BT Which of t, You are working on the obstetric ward caring for a client who had an emergency caesarean 2 days ago. q The brother and sister had no choice but to breed with each other (scandal!). 8 0 0 8 72 564.99997 Tm Four generations of the hybrid from another island bred with other G. fortis finches on the island until a drought occurred, wiping out all but one brother and sister. BT Use the information and charts to answer the questions on . vol. - Evolution and the Origin of Species (adsbygoogle = window.adsbygoogle || []).push({}); Developing an Explanation for Mouse Fur Color (HHMI). An immigrant landed on the island. A. gradual B. sympatric C. allopatric D. sexual E. adaptive, When species are kept separate by preventing the formation of hybrid zygotes, the mechanism that keeps the species separate is known . 8 0 0 8 100.45605 77.99991 Tm Suggest a reason why two closely related individuals would mate with each other rather than other nearby birds. "It is very striking that when we compare the size and shape of the Big Bird beaks with the beak morphologies of the other three species inhabiting Daphne Major, the Big Birds occupy their own niche in the beak morphology space," said Sangeet Lamichhaney, a postdoctoral fellow at Harvard University and the first author on the study. interbreeding links. What is a long only commodity fund, describe its main features. Students will be somewhat familiar with finch studies if they have already watched the HHMI video on speciation and finches. BT BT One route to speciation Field observations have shown how an immigrant finch hybridized with the medium ground finch (Geospiza fortis) on Daphne Major in the Galpagos archipelago. (http://www.sciencemag.org/help/reprints-and-permissions)Tj This type of isolating mechanism would be behavioral isolation because both male and female species developed different songs that each other could not recognize. (Terms of Service)Tj What evidence suggests that the immigrant finch lineage may be on its way to forming a new species? Compare the photos of the birds. In, 1981 a population of finches of the species, lived on the Galapagos island of Daphne Major. Good thing these are birds. (8 pts) The catalytic destruction of ozone by chlorine in the stratosphere can, for example, proceed through the following reactions: Cl + 03 - CIO + 02 (1) C10 + 03 - Cl + 2 02 (2) R, = 10 molec. The study was supported by the Galpagos National Parks Service, the Charles Darwin Foundation, the National Science Foundation, the Knut and Alice Wallenberg Foundation, and the Swedish Research Council. "The novelty of this study is that we can follow the emergence of new species in the wild," said B. Rosemary Grant, a senior research biologist, emeritus, and a senior biologist in the Department of Ecology and Evolutionary Biology. The color of the bottom beak in the fifth generation offspring of the immigrant is orange while the native G. fortis resident's beak is fully black. -3.55701 0 Td The breeding of two distinct parent species gave rise to a new lineage (termed "Big Bird" by the researchers). Equinox Yorkville Membership Fees, The title )Tj accounting. I cant get it to open? % 48. Is there any evidence of allopatric speciation? ", Schematic illustration of the evolution of the Big Bird lineage on the Daphne Major island in the Galpagos archipelago. In fact, some of the most important studies showing natural selection in . (http://science.sciencemag.org/content/355/6328/910)Tj A voltage signal is described by the expression () = (12) + (17), where y is in units of volts. After many generations in isolation, would you consider the Big Bird (immigrant) lineage a new species? Tale of Speciation on Daphne Major. 0 g 1. /T1_0 1 Tf With an incorrect song, the female bird may not have a preference for it or not recognize it at all. /T1_1 1 Tf Show all the steps in your calculation and give your answer to the nearest whole number. Identify the genotypes of the following individuals: IndividualGenotype II-1 II-2 II-4 II-5 III-2, Use the following information to answer the next two questions. Grant, P. R., and Grant, B. R. (2009). BT 145 0 obj DALiM Software Applications The two graphs above show the beak depths, measured in mm, of 100 medium ground finches from Daphne Major. This kind of speciation is known as allopatric speciation. (http://science.sciencemag.org/content/355/6328/910#BIBL)Tj Privacy Only two species of Darwin finches are found on this island Studies were made every year from 1970 to 1989 on the beak size of the island's population of ground finch, Geospizafortis by measuring the beak length of every bird (Fig. ET Explain your reasoning. Study with Quizlet and memorize flashcards containing terms like Allopatric Speciation Occurs when., sympatric speciation occurs when two populations, allopatric speciation is most likely to occur in which of the following scenarios? A new study illustrates how new species can arise in as little as two generations. Tale+of+Speciation+on+Daphne+Major+student+edition.docx, California State University, Dominguez Hills, Kami Export - Sujey Cazares - Speciation Modes (home).pdf, Natural Selection video_recap_of_natural_selection_by_amoeba_sisters_v3.docx, Investigation Proteins Sequences Are Bats Birds.pdf, 14. 1. Grant & B.R. endobj In 1981, a graduate student working with the Grants on Daphne Major noticed the newcomer, a male that sang an unusual song and was much larger in body and beak size than the three resident species of birds on the island. This work was originally posted in another group, though I did modify it and change formatting for remote lessons. 6 0 0 6 79 439 Tm But after about four generations, Daphne Major experienced a severe drought, which killed many of the finches. Description. How might the size of the gene pool contribute to the low variety in beak size for the immigrants? Would you be able to email me the PDF of the speciation finch activity? Examine the graphic and description. /T1_2 1 Tf An introduction to evolution: what is evolution and how does it work? He was so different from the other birds that we knew he did not hatch from an egg on Daphne Major," said Peter Grant, the Class of 1877 Professor of Zoology, Emeritus, and a professor of ecology and evolutionary biology, emeritus. Good thing these are birds. In 1. It is likely that new lineages like the Big Birds have originated many times during the evolution of Darwins finches, according to the authors. Q )Tj If they become ecologically or behaviourally distinct and avoid. As a result, the offspring mated with members of their own lineage, strengthening the development of the new species. Explain. endobj [146 0 R 147 0 R 148 0 R 149 0 R 150 0 R] Fig. 8 0 0 8 187 473 Tm Long only commodity fund have generated returns similar to diversified equity funds. A.Community Development Corporations (CDC) were conceived as part of the War on Poverty in 1966. Course Hero is not sponsored or endorsed by any college or university. /T1_1 1 Tf HyTSIa "6p\Px:Z.Suk:8ud,E:xtSVk9@na}/ 6Gy@{_rcL"bFSgjz"UH}>2Z endobj Wagner, C. E. (2018). An immigrant Darwin's finch to Daphne Major in the Galpagos archipelago initiated a new genetic lineage by breeding with a resident finch (Geospiza fortis). /T1_0 1 Tf Consequently, the original group would not breed . Privacy Policy. Why or why not? members of a species genetically. The offspring developed into a new species that the researchers call the Big Bird lineage. father, it was copied incorrectly. Study with Quizlet and memorize flashcards containing terms like Scientists have found as many as 500 species of fish in the African Lake Victoria. Yes, I would consider the Big Bird (immigrant) lineage a new species because they no longer interbreed with the native G. fortis resident and their offspring have differing chromosomes which result in genetic differences. Science Magazine Back in 2010, we reported on a speciation event that was observed in real time on the Galapagos islands: in 1981 an immigrant finch arrived on the island of Daphne Major and began breeding there with a local female (a medium ground finch, Geospiza fortis) under the watchful eye of biologists.That pairing wound up establishing a new lineage of finches that bred only . 5.50301 1 Td This worksheet focuses more on speciation and reproductive isolation. %PDF-1.4 % 2 0 obj (http://science.sciencemag.org/)Tj Answer . A barrier was in place that originally resulted from one immigrant being separated from its own. . Marriage between the people from the same lineage. ( is a registered trademark of AAAS. Download File PDF Darwin Natural Selection Worksheet Answer Key For among the finches of Daphne Major, natural selection is neither rare nor slow: it is taking place by the hour, and we can watch. 0 1.00001 TD (B. Rosemary Grant and Peter R. Grant)Tj Expert Answer. /T1_0 1 Tf Lake Victoria is a very ancient lake; therefore, there has been more time for a variety of species to evolve. -3.83501 0 Td application/pdf 2021 Chrysler Pacifica Hybrid Towing Capacity, Adres: Gmina Radomin finches on the island until a drought occurred, wiping out all but one brother and sister. -3.83501 0 Td (Video, 1 hr) The Origin of Tetrapods | Your Inner Fish A vs. B 5. What can account for this high level of diversity in a single habitat? The authors of the study have previously reported that there has been a considerable amount of gene flow among species of Darwins finches over the last several thousands of years. This clearly demonstrates the value of long-running field studies," he said. The researchers took a blood sample and released the bird, which later bred with a resident medium ground finch of the species Geospiz fortis, initiating a new lineage. 2.2.If freepreimplantation genetic testing was available free to all couples, do we have an obli. Students have already studied stickleback fish and the rock pocket mouse. Discuss how the finch species on Daphne Major illustrate both sympatry and allopatry. Grant, and Princeton University Press, which first published the remaining images in "40 Years of Evolution". (Use of this article is subject to the )Tj In terms of the barriers in place that keep species separate, explain whether song recognition is a prezygotic barrier or a post-zygotic barrier. unknown island, was unusually large, had a huge beak, and sang a strange song. ET But, females of this new population understood the song even though it was wrong. The history of life: looking at the patterns, Pacing, diversity, complexity, and trends, Alignment with the Next Generation Science Standards, Information on controversies in the public arena relating to evolution. PK ! /T1_0 1 Tf Students must answer a final synthesis question about how the population models types of speciation. "Thus, the combination of gene variants contributed from the two interbreeding species in combination with natural selection led to the evolution of a beak morphology that was competitive and unique. News update, July 2018. 1. These differences contribute to reproductive isolation because this difference can be the starting point in the creation of a new species or these birds will not reproduce because of this mere difference. Tale of Speciation on Daphne Major " Speciation, the process by which two species form from one, involves the development of reproductive isolation of two divergent lineages." 1 This is an interesting tale of a small population, an immigrant, incest, and . 3 0 obj What kind of speciation do we normally, associate with members from one population, being geographically displaced to a new, smaller, associate with members of a population that, become ecologically or behaviorally distinct within. ET 0 0 1 rg True But, females of this new populations understood the song even though it was, population ignored the incorrect song and would not mate with the males, who sang it. 10.3.U4 Speciation due to divergence of isolated populations can be gradual. Verified answer. Data Sets. This page titled 18.1C: The Galapagos Finches and . An immature male finch immigrated to the small Galpagos Island of Daphne Major (0.34 km 2) in 1981 ( 11 - 13 ). Question 22 options: Common stockholders have the right to vote for the board of directors and on major corporate events. What are the components of the returns from a long, Which of the following statements is FALSE? default Grant, 2014, 2023 The Trustees of PrincetonUniversity, Study of Darwin's finches reveals that new species can develop in as little as two generations, Study of Darwins finches reveals that new species can develop in as little as two generations, Gene flow between species influences evolution in Darwins finches, A gene that shaped the evolution of Darwin's finches, Gene behind 'evolution in action' in Darwin's finches identified, Noted Princeton husband-and-wife team wins Kyoto Prize, 'Fantastic giant tortoise,' believed extinct, confirmed alive in the Galpagos, Princeton geneticist solves long-standing finch beak mystery, Lecture honors Kyoto Prize-winning Grants, Department of Ecology and Evolutionary Biology, Equal Opportunity Policy and Nondiscrimination Statement. The direct observation of the origin of this new species occurred during field work carried out over the last four decades byB. Rosemary Grant and Peter Grant, a wife-and-husband team ofscientists from Princeton, on the small island of Daphne Major. Speciation, the process by which two species form from one, involves the development of reproductive isolation of, This is an interesting tale of a small population, an immigrant, incest, and isolation. What did the Grant's mean when they said they would treat the endogamous group as an incipient species? 1.Presume the existence of the following variables: int x; Does the following statement hold true for all values of each variable?Which ranges work as expected?Which don't? Science Journals - Operations The strange subpopulation, which were playfully named Big Birds would sing songs that the other birds didnt recognize. Why do you think the immigrant lineage moved to the nesting sites (2007) away from the original sites? For example, one scenario reads Squirrels on the Kaibab plateau cannot easily reach the valley where gray squirrels live. Figure 18.1 C. 1: Finches of Daphne Major: A drought on the Galpagos island of Daphne Major in 1977 reduced the number of small seeds available to finches, causing many of the small-beaked finches to die. When you enter the room, your client is complaining of being cold and achy. stream The secondary contact phase of allopatric speciation in Darwin's finches. It was a hybrid of two finch species from another island. 0 0 1 rg Types of Selection Graphing. The direct observation of the origin of a new species occurred during field work carried out over the last four decades by B. Rosemary Grant and Peter Grant, a wife-and-husband team of scientists from Princeton, on the small island of Daphne Major in the Galpagos Islands in the Pacific Ocean. uuid:5f738fd2-1dd2-11b2-0a00-1e0000000000 <> Covergirl Trublend Undercover Concealer Uk, How to improve accountability in the workplace? 8 0 0 8 72 611 Tm ABO Blood Type The following pedigree shows the incidence of ABO blood types in a family. Eyewitnesses to Speciation. D3 [Content_Types].xml ( j0EJ(eh5vD)!Kohdh>(kR6L,YL[HQZ)B`hu"R{. throughout the population over time. - Introduction to Evolution (Discussion) (licensee American Association for the Advancement of Science. <>>> Northern Colorado Eagles Twitter, Anole Lizards and Temperature (CER) Data Analysis: North American Opossum. It is young: It rose from the sea only about 15,000 years ago. Grant means that the endogamous group would be treated as an incipient species because they became genetically isolated from the rest of the population. Later, the new group moved to a different area of the island and would only mate with closely related members. Students learn about a case where speciation occurred between two populations of finches. BT Propose a definition for "endogamous lineage"? A typical value of diversity for a lake the size of Lake . Accounting questions and answers. This is an interesting tale of a small population, an immigrant, incest, and isolation. (Watching speciation in action)Tj The Grants and their research team followed the new "Big Bird lineage" for six generations, taking blood samples for use in genetic analysis. <>/MediaBox[0 0 594 758.834656]/Parent 128 0 R/Resources<>/ExtGState<>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>>/TrimBox[0 0 594 758.834656]/Type/Page>> Birds are grouped by beak size with a range of 0.2 mm. I spend a lot of time with students studying real populations and data to reinforce the concept that evolution is happening and not just something that happened in the past. 10.3.A1 Identifying examples of directional, stabilizing and disruptive selection. ET 0 0 1 rg Consequently, the original group would not breed with these new group, because they had a larger size and a different song. Good thing these are birds. endobj Surrounding nest 16833 are typical G. fortis nesting sites. 106 no. Figure 3 A B Population Size Seed Abundance (g/m 2) Estimates 95% Confidence Limits Daphne. Radomin 1a 133 0 obj <>stream ET The remote location has enabled researchers to study the evolution of biodiversity due to natural selection under pristine conditions. Science Magazine Article (This article cites 15 articles, 3 of which you can access for free)Tj (2007). The study tracked Darwin's finches on the Galpagos island of Daphne Major, where a member of the G. conirostris species (pictured) arrived from a distant island and mated with a resident finch of the species G. fortis. (Downloaded from )Tj DA_0303Perspectives.indd 910 3/1/17 11:03 AM 2. %PDF-1.5 (DOI: 10.1126/science.aam6411)Tj An immigrant species bred with the local birds on the island which created a new lineage of birds, which were different from the original population. Song recognition is a prezygotic barrier because this lack of communication prevents mating and fertilization. All 18 species of Darwins finches derived from a single ancestral species that colonized the Galpagos about one to two million years ago. 2 2001 WGBH Educational Foundation and Clear Blue Sky Productions, Inc. All rights . Hardy-Weinberg Pocket Mouse | Hardy Weinberg Problemset. Explore "Reproductive Barriers" at https://learn.genetics.utah.edu/content/evolutionlbarriers/ to complete the following table: . ( \(6328\), 910-911. So when they spotted a male bird that looked and sounded different from the three species residing on the island, they immediately knew he . 1. Social Graces Ppt, 0 0 m Figure 3: Changes in Geospiza fortispopulation and seed abundance on Daphne major, before and after the drought of 1977 (Grant 1986). A barrier was in place that originally resulted, from one immigrant being separated from its own population. BT 3.83501 1 Td endobj The medium ground finch has a stubby beak and eats mostly seeds. 2019-04-03T12:07:36-07:00 If they become ecologically or behaviourally distinct and av . Best Ios Bitcoin Wallet Reddit 2021, "We didn't see him fly in from over the sea, but we noticed him shortly after he arrived. I designed this worksheet for remote learning, so answer fields are shaded to help me grade them and to indicate where students should answer questions or review data. When I click on google docs it brings up a jpeg of the worksheet, Hello, the PDF link is not available and I cannot open a non-blurry images of the links in any browser. "Charles Darwin would have been excited to read this paper.". Completing a set of vit, Which statement is false? The immigrant lineage has only a population of 20 while the native lineage 280 birds sampled. 16-3 The Process of Speciation Standards: Bio 8a, 8b, 8d . <> The offspring also differed from the resident species in beak size and shape, which is a major cue for mate choice. BT <>/Filter/FlateDecode/Height 87/Length 19684/Name/X/Subtype/Image/Type/XObject/Width 350>>stream This reproductive isolation is considered a critical step in the development of a new species when two separate species interbreed. BT Here we report the results of a combined ecological and genomic study of Darwin's finches that documents hybrid speciation in the wild from its inception to the development of reproductive isolation. Alternatively, you could remove the shaded boxes for print material. THANKS!!! BT -1.668 0 Td This isolation is an example of sympatric speciation because two populations of a species that were once inhabiting the same area and interbreeding become reproductively isolated from each other. The study, "Rapid hybrid speciation in Darwin's finches," by Sangeet Lamichhaney, Fan Han, Matthew T. Webster, Leif Andersson, B. Rosemary Grant and Peter R. Grant, was published in the journal Science on Nov. 23.

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