Antibiotic Overuse May Increase Superbug Evolution Rate Multiple drug-resistant Staphylococcus aureus bacteria seen under an electron microscope. Photo: CDC By flooding our environment with antibiotics, people may alter a little-appreciated but profound aspect of bacterial evolution: the very pace at which it occurs. Bacteria may evolve more rapidly and more radically than just a few decades ago.
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? Rediscovering Biology - Case Studies: The Genetics of Resistance to HIV Infection This case uses the example of HIV, to explore the relationships between viruses, cells and the immune system, and the role of genes in disease resistance. An animation explains PCR (polymerase chain reaction) and electrophoresis and their practical use as a genetic test. We will see how mutations in an HIV receptor confer relative reslstance to infection. We will find out how often this mutation occurs in the general population, and see data about additional mechanisms of HIV resistance.
TED-Ed New Interactive Periodic Table With Video Lessons for Every Element October, 2014 Today, TED-Ed launched a clickable periodic table with videos on every element. This work is a fruit of a partnership between TED-Ed and Brady Haran, the creator of the popular YouTube channel Numberphile. The purpose behind this period table is to provide students with both a refresher and a study aid to help them better understand the different chemical elements and their properties.
Escher for Real The work of M.C. Escher needs no introduction. We have all learned to appreciate the impossibilities that this master of illusion's artwork presents to the layman's eye. The pace of evolution The pace of evolution Does evolution occur in rapid bursts or gradually? This question is difficult to answer because we can't replay the past with a stopwatch in hand. However, we can try to figure out what patterns we'd expect to observe in the fossil record if evolution did happen in bursts, or if evolution happened gradually.
Male Chromosomes Are Not Dying Soon, Study Finds : News Update Date: Jan 11, 2014 05:31 PM EST A new study has challenged the notion that Y chromosomes are largely unimportant and will no longer exist in the next 5 million years. (Photo : Image Editor/Flickr) A new study has challenged the notion that Y chromosomes are largely unimportant and will no longer exist in the next 5 million years. The study has based its findings on a comparison of Y chromosomes in eight African and eight European men. Feed the Dingo - A Fun Game About Ecosystems Feed the Dingo is a fun game that teaches students about the importance of maintaining balanced ecosystems. In the game students have to build and maintain a desert ecosystem. The game begins with a blank slate to which students have to add plants and animals. The game plays out over twelve virtual days.
Sound Matrix The Sound Matrix was a clever bit of flash that was mailed to me some time back. I later discovered that the file was originally composed by Andre Michelle. As per original instructions “Press SPACE key to clear. Right-Click for Copy & Paste to your blog, happy days, good time, comment if you LIKE!”.
Transitional forms Transitional forms Fossils or organisms that show the intermediate states between an ancestral form and that of its descendants are referred to as transitional forms. There are numerous examples of transitional forms in the fossil record, providing an abundance of evidence for change over time. 100 Years of Breed “Improvement” For the sake of honest disclosure, I will admit to owning “purebreds” (the ‘pureness’ of purebreeds is a discussion for another time) but I also have mutts. All the dogs I’ve had since childhood had a few things in common, they were friendly, prey driven, ball-crazy, intense, motivated, athletic (crazy dogs are easier to train) and none had intentionally bred defects. I would never buy/adopt a dog whose breed characteristics exacted a health burden.(Asher 2009). That just incentivizes people to breed more of these intentionally unhealthy animals.
2016 January 25 - Where Your Elements Came From Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2016 January 25 Explanation: The hydrogen in your body, present in every molecule of water, came from the Big Bang. There are no other appreciable sources of hydrogen in the universe. The carbon in your body was made by nuclear fusion in the interior of stars, as was the oxygen. Miegakure: A puzzle-platforming game in four dimensions Miegakure is a platform game where you navigate a four-dimensional world to perform miraculous feats and solve puzzles. Miegakure is a puzzle-platforming game that lets you explore and interact with a four-dimensional world. The fourth dimension in this game works just like the first three: it is a mathematical generalization. Your ability to move in the fourth dimensions in addition to the usual three allows you to perform miraculous feats like seeing inside closed buildings, walking through walls, stealing objects from closed containers, binding two separate rings without breaking them, etc...
Life Science Learning Goals Which skull is a lizard and which is a snake? During this session, you will have an opportunity to build understandings to help you: Define what is meant by “species.” Describe how new species evolve as a result of variation and adaptation through natural selection.