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Google. Science & Nature - Human Body and Mind. Genome Browser Home. David Knuffke on Prezi. Home. BioLogica™ main page. Homo Sapiens - La grande storia della diversità umana La grande storia della diversità umana. Understanding Genetics: Human Health and the Genome. Try your luck at DNA Roulette.

Understanding Genetics: Human Health and the Genome

Watch out, you might even learn something...Learn More See whether online genetic tests are right for youLearn More When Will Broccoli Taste Like Chocolate? Learn about our book! Science Of Gardening: Feed: Plants and people alike, we all have a need to feed. Viaggio con Darwin. L'idea della serie In viaggio con Darwin/Il secondo giro attorno al mondo è semplice ed efficace: Darwin viene prelevato dalla sua attuale dimora a Westminster e ripete con Luca Novelli e i suoi compagni lo straordinario viaggio compiuto cento e settanta anni prima.

Per l'occasione è tornato giovanotto, ovvero ventiduenne, come quando fu invitato per la prima volta a bordo del Beagle dal Capitano FitzRoy. Evolve or Die. INBIOCHEM – inside biomolecular chemistry – la scienza a confine tra la chimica e la biologia. How Vaccines Are Made — History of Vaccines. Climate Effects on Human Evolution. This article explores the hypothesis that key human adaptations evolved in response to environmental instability.

Climate Effects on Human Evolution

This idea was developed during research conducted by the Smithsonian’s Human Origins Program. Natural selection was not always a matter of ‘survival of the fittest’ but also survival of those most adaptable to changing surroundings. (Illustrations for this article coming soon.) Background Paleoanthropologists – scientists who study human evolution – have developed a variety of ideas concerning how environmental conditions may have stimulated long-term human evolutionary change. An important feature of Earth history during the period of human evolution is environmental change, including cooling, drying, and wider climate fluctuations over time. Environmental Fluctuations. The Science of Food and Drink. Evolution of Evolution - 150 Years of Darwin's "On the Origin of Species"

iNaturalist.org · A Community for Naturalists. S BioInteractive. Tree of Life Web Project. Medical Animation Library. ©Copyright 2009 A.D.A.M., Inc.

Medical Animation Library

Any duplication or distribution of the information contained herein is strictly prohibited. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed physician should be consulted for diagnosis and treatment of any and all medical conditions.

Call 911 for all medical emergencies. Build a Body. Zygote Body. Home of CELLS alive! 3D Human Anatomy for Animation, Illustration, CAD and Software Development. Zygote Body. Tree of Life Web Project. Biology and Life Science Video Animations. Anomalocaris strikes back! Sono sicura che se questo articolo fosse stato pubblicato da una qualsiasi rivista, che non fosse Pikaia, nessuno si sarebbe soffermato su questo titolo.

Anomalocaris strikes back!

Ma in questo contesto il termine Burgess Shale ha un significato unico, qualcosa che tutti conoscono ed ha un valore evolutivo immenso! Ma vediamo di fare chiarezza per “i non addetti ai lavori”. Burgess Shale è un giacimento fossilifero, che si trova in British Columbia, lo stato canadese che si affaccia sul Pacifico, nel territorio della cittadina di Field. Il giacimento fu scoperto nel 1909 da Charles Doolittle Walcott sul lato di sud-ovest di un crinale posto tra il Mount Field e il Wapta Mountain, nello Yoho National Park (scavo). La scoperta avvenne grazie ad una serie di coincidenze, prima fra tutte la costruzione della Ferrovia Transcanadese, la Canadian Pacific Railway, che attraversò questa zona delle montagne Rocciose e di cui Field, nacque inizialmente come deposito di locomotive, e divenne poi una piccola città.

Fireflies (Coleoptera: Lampyridae) « Teaching Biology. The Lampyridae Raffinesque 1815 are the beetles commonly known as fireflies and lightning bugs.

Fireflies (Coleoptera: Lampyridae) « Teaching Biology

There are over 2000 species in over 100 genera, with this being a quarter of the expected diversity (Viviani, 2001). They’re found all over the world and in all sorts of habitats, including aquatic ones (Fu et al., 2005). Their classification has classically not followed a phylogenetic system – as McDermott (1964) wrote, their classification “should not be construed as indicating phylogenetic relationship”.

Of course, I don’t agree with such a view, being a paraphyly-hating systematist rather than a taxonomist. Lampyrid subfamilies are differentiated with easy-to-spot characters, such as the position of the light organs or the dorsal visibility of the head (how far under the pronotum it goes – it can be completely covered, as in cockroaches, or more exposed). Systematically, they belong to the Elateroidea. With these genera removed, 3 autapomorphies appear to define a monophyletic Lampyridae:

Risorse e Networking per le Life Sciences. Interactive Biology, By Leslie Samuel. The Wild Classroom: Biology Videos and Podcasting via Ecogeeks. Biomes of the World - Biome Map. Click on a biome on the above graph for more information, informative videos, and links to scientist profiles, travel information, lesson plans and species profiles for each region.

Biomes of the World - Biome Map

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