Evolution biologique-Histoire du vivant-biodiversité-mécanismes de l'évolution-le temps en géologie UPD8 - Antibiotic cockroaches - Type: Activity Learning Strategy: Data work Topic: Drugs Superbugs like MRSA are on the rampage, killing vulnerable hospital patients. What are scientists doing to combat antibiotic-resistant pathogens? This activity teaches new content from the 2011 GCSE specification. At the same time it develops the assessed skill of explaining how strongly evidence supports a hypothesis. Antibiotic Cockroaches is a sample from our new Crucial pack, building skills for better GCSE results. Note: this is a beta version, before final testing, and not the finished publication Published: 4th July 2011Reviews & Comments: 2 Learning objectives • Find out how harmful bacteria form antibiotic-resistant strains. • Discover why resistant strains spread rapidly. • Draw conclusions from evidence about new ways of treating infections. Try the activity You will need Acrobat Reader installed to open the activity sheets. This lesson addresses in particular, new content from AQA A Core GCSE, statement: B1.1.2j Oct 28th, 2013
RAZVOJ EVOLUCIONE MISLI | ARHE Arhe VI, 11/2009 Originalni naučni rad / Original Scientific Paper Prirodno-matematički fakultet, Novi Sad : Teorija evolucije najvažnija je teorija u biologiji, jedinstvena u kombinaciji univerzalnih principa i primenljivosti. Poznata krilatica Teodosijusa Dobžanskog, jednog od vodećih evolucionih biologa XX veka, da „u biologiji ništa nema smisla osim onog u svetlu evolucije“ naglašava ključno mesto evolucije u modernoj biologiji. Primenom evolucionih principa i metoda se uspešno rešavaju mnogi praktični problemi, od onih u medicini (sinteza novih lekova, antibiotska otpornost), industriji (sinteza industrijskih enzima), poljoprivredi (selekcioni programi, otpornost na fungicide, pesticide i insekticide), do menadžmenta u zaštiti biodiverziteta i potencijala adaptacije bioloških entiteta na klimatske promene. : Darvinova teorija evolucije, evoluciona ideja, Sintetička teorija evolucije Bogatstvo i diverzitet organskog sveta je rezultat evolucije. Razvoj evolucione teorije (Milankov, 2007)
Evolution VPL: Directory Page [Lab I][Lab II][Lab III][Lab IV][Lab V][Lab VI][Lab VII][Lab VIII][Lab IX][Lab X][Lab XI][Lab XII] What are the synapomorphies for land plants? What does it take? Secondarily reduced? How is it like a moss? A grade? A grade? Heterospory and the origin of seeds? Why sisters? Why is this node unresolved? Biogeography for members of this clade? Alternative topologies? Double fertilization - what was the ancestral state? Age of the anthophytes and stratigraphic debt? Can we resolve this node? What about Zygopteris, Stauropteris, and Cladoxylon? Is there a good synapomorphy for ferns?
The Immortal Life « Rebecca Skloot Her name was Henrietta Lacks, but scientists know her as HeLa. She was a poor black tobacco farmer whose cells—taken without her knowledge in 1951—became one of the most important tools in medicine, vital for developing the polio vaccine, cloning, gene mapping, in vitro fertilization, and more. Henrietta’s cells have been bought and sold by the billions, yet she remains virtually unknown, and her family can’t afford health insurance. Soon to be made into an HBO movie by Oprah Winfrey and Alan Ball, this New York Times bestseller takes readers on an extraordinary journey, from the “colored” ward of Johns Hopkins Hospital in the 1950s to stark white laboratories with freezers filled with HeLa cells, from Henrietta’s small, dying hometown of Clover, Virginia, to East Baltimore today, where her children and grandchildren live and struggle with the legacy of her cells.
EVOLUCIJA I DIVERZITET ŽIVOTA | ARHE Eseji iz dela Ernsta Majera Arhe VI, 11/2009 Prevod / Translation Da je evolucija činjenica i da zapanjujući diverzitet životinja i biljki evoluira postepeno, bilo je sveopšte prihvaćeno ubrzo nakon 1859. godine. Ali pitanje kako se ova evolucija odvijala, naročito pitanje prirode njene pokretačke sile, jeste izvor kontroverzi od samog početka. Među stručnjacima je dostignuta skoro potpuna saglasnost u poslednjim decenijama. Bilo da su botaničari ili zoolozi, paleontolozi ili genetičari, svi oni interpretiraju rezultate evolucionog procesa na isti način i pronalaze iste uzročne veze. Kako savremeni biolozi vide proces evolucije? Darvinovo objašnjenje evolucije, u tom smislu, jeste dualistčko. Genotip je totalitet genetičkog nasleđa koje indivudua dobija od roditelja u začeću (formiranju zigota). Ali zašto je ovaj dualitet genotipa i fenotipa toliko važan za evolucioniste? Druga posledica je jednako važna. Nerazumevanja u pogledu prirode selekcije takođe su velika. Mayr, E. 1963.
Cofrin Center for Biodiversity Next NAS Seminar is Friday, April 11, 2014 How do scientists study how molten rock intrusionsgrows? Dr. Ryan Currier, geologist and Associate Professor of Geosciences in the NAS department, will be discussing his work modeling these systems in "The Flowering of Magma Bodies in the Crust". Social @ 3:15 pm in ES 317 -- Lecture @ 3:45 pm in ES 301, note time change. Save the Date for the Heirloom Plant Sale Seed catalogs have arrived and we are busy planning for this year's sale to be held on May 17th 9-3 in the Lab Sciences Greenhouse. A new tool for measuring forest health! Biodiversity data manager Erin Giese, along with NAS faculty, and TNC staff have developed a a new rigorous, transparent tool for measuring forest health in northern mesic forests of the western Great Lakes region based on local breeding bird assemblages. We are looking for Volunteers! Are you looking to gain valuable field or lab experience to build your resume?
Charles Darwin - Le voyage d'un naturaliste autour du monde- CNRS sagascience - Tous les textes du site Tous les textes du site Plan du site Crédits Accueil - Voir l'animation ETAPE 1 27 décembre 1831 Plymouth, côte sud-ouest de l’Angleterre. Bloqué à quai depuis plus d’un mois par le mauvais temps, un voilier de 240 tonneaux affrété par l’amirauté britannique quitte enfin le port : c’est le HMS Beagle (His Majesty’s Ship Beagle). ETAPE 2 Du 27 décembre 1831 au 28 février 1832 Darwin démarre l’aventure par un terrible mal de mer tandis que le Beagle fait route sur Bahia au Brésil. ETAPE 3 Du 28 février au 5 juillet 1832 A son arrivée à Bahia, Darwin est d’emblée subjugué par la luxuriance de la forêt brésilienne. ETAPE 4 Du 5 juillet au 27 novembre 1832 Marsouins, phoques, manchots et feux d’artifice naturels ponctuent le trajet du Beagle entre Rio de Janeiro et Montevideo. ETAPE 5 Du 27 novembre 1832 au 26 avril 1833 Depuis le 27 novembre 1832, le navire fait route vers la Terre de Feu, à la pointe sud du continent américain. ETAPE 8 Du 10 juin 1834 au 4 février 1835
Teaching About Evolution and the Nature of Science In a 1786 letter to a friend, Thomas Jefferson called for "the diffusion of knowledge among the people. No other sure foundation can be devised for the preservation of freedom and happiness."1 Jefferson saw clearly what has become increasingly evident since then: the fortunes of a nation rest on the ability of its citizens to understand and use information about the world around them. We are about to enter a century in which the United States will be even more dependent on science and technology than it has been in the past. Such a future demands a citizenry able to use many of the same skills that scientists use in their work—close observation, careful reasoning, and creative thinking based on what is known about the world. The ability to use scientific knowledge and ways of thinking depends to a considerable extent on the education that people receive from kindergarten through high school. Nevertheless, religious faith and scientific knowledge, which are both useful and important,
Homo erectus - H. erectus is a well known hominid IntroductionThroughout the early years of paleoanthropology, there were only two different species that were attributed to the genus Homo. These included the Neanderthals, and Homo erectus. In the early 1960s, this began to change, and human ancestry seemed to be populated by many different players. Accordingly, erectus is one of the better-known members of genus Homo, especially in terms of its well-established place in paleoanthropology. This has begun to change, however, and now some question its place in human evolution. Some (e.g., M. The species was named by Eugène Dubois (it was originally designated as Pithecanthropus erectus) in 1894, after his 1891 find from Trinil, Java, in Indonesia (Trinil 2). The material was later associated with the Chinese material from Zhoukoudian, and renamed Homo erectus. Diagnostic Features This view has some validity in that these species are usually considered “chronospecies” due to anagenesis. Another African erectus specimen is KNM-ER 3883.
Biodiversity I - LES NIVEAUX DE LA SELECTION : de la molécule à l’individu - Le Cactus Heuristique L’histoire de la sélection naturelle Charles Darwin (photo à gauche) défini la notion de sélection naturelle comme la « préservation des variations favorables dans la lutte pour la vie, et le rejet des variations préjudiciables ». Le concept de sélection naturelle postule un tri de certains caractères biologiques au cours des générations, qui découle du fait que les porteurs de ces caractères se reproduisent mieux que les membres de la population qui en sont dépourvus. A partir des connaissances acquises sur l’hérédité, la sélection naturelle a ensuite été divisée en 3 modes d’action agissant sur la distribution des phénotypes dans une population: - La sélection directionnelle : elle sélectionne un type unique de phénotype dans la population. Le niveau d’application de la sélection n’a pas vraiment été intégré aux débats qui ont animées les évolutionnistes peu après l’arrivée de la théorie de l’évolution à la fin du XIXème siècle. Pourtant, en 1945, le biologiste suédois G. S.J. Les gènes
Interactive Documentary | Becoming Human Becoming Human is an interactive documentary experience that tells the story of our origins. Journey through four million years of human evolution with your guide, Donald Johanson. Transcripts are available in the following languages: English, Spanish, Italian, Chinese, and Sinhala. Please note: The Documentary has been converted to HTML5 - the Flash version has been retired.