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Understanding Evolution

Understanding Evolution
The bacteria that changed the world - May, 2017 The make-up of Earth's atmosphere, once the domain of Earth science textbooks, has become an increasingly "hot" news topic in recent decades, as we struggle to curb global warming by limiting the carbon dioxide that human activity produces. While the changes that humanity has wrought on the planet are dramatic, this isn’t the first time that one species has changed Earth’s atmosphere. Three billion years ago, there was no free oxygen in the atmosphere at all. Life was anaerobic, meaning that it did not need oxygen to live and grow. That all changed due to the evolution of Cyanobacteria, a group of single-celled, blue-green bacteria. Read the rest of the story here | See the Evo in the News archive

Related:  SCIENCE / ODDITIESAPBIOTeaching & Learning RessourcesNatural Selection and AdaptationEvolution

Contrasting and categorization of emotions The contrasting and categorisation of emotions describes how emotions are thought to relate to each other. Various recent proposals of such groupings are described in the following sections. Contrasting Basic Emotions[edit] The following table,[1] based on a wide review of current theories, identifies and contrasts the fundamental emotions according to a set of definite criteria. The three key criteria used include: 1) mental experiences that have a strongly motivating subjective quality like pleasure or pain; 2) mental experiences that are in response to some event or object that is either real or imagined; 3) mental experiences that motivate particular kinds of behaviour.

Tree of Life Web Project The Tree of Life Web Project (ToL) is a collaborative effort of biologists and nature enthusiasts from around the world. On more than 10,000 World Wide Web pages, the project provides information about biodiversity, the characteristics of different groups of organisms, and their evolutionary history (phylogeny). Each page contains information about a particular group, e.g., salamanders, segmented worms, phlox flowers, tyrannosaurs, euglenids, Heliconius butterflies, club fungi, or the vampire squid. ToL pages are linked one to another hierarchically, in the form of the evolutionary tree of life. Starting with the root of all Life on Earth and moving out along diverging branches to individual species, the structure of the ToL project thus illustrates the genetic connections between all living things.

BioInteractive Search Results Lectures How reasoning and evidence are used to understand human evolution. Genetic evidence shows that humans evolved in Africa and continue to evolve. Stone tools are well-preserved evidence of past human activity. The hominid fossil record of the past six million years gives us surprising insights into the path of human evolution. How did life originate? How did life originate? Living things (even ancient organisms like bacteria) are enormously complex. However, all this complexity did not leap fully-formed from the primordial soup.

BioInteractive Search Results Series Where and when did humans arise? What distinguishes us from other species? Did our distant ancestors look and behave like us? How has the amazing diversity of plants and animals evolved? Darwin Online: Darwin's Publications British Entomology [←click finches for illustrations] 1829-1832. [Records of captured insects]. In Stephens, Illustrations of British entomology. Text PDF F1968

60 Small Ways to Improve Your Life in the Next 100 Days Contrary to popular belief, you don’t have to make drastic changes in order to notice an improvement in the quality of your life. At the same time, you don’t need to wait a long time in order to see the measurable results that come from taking positive action. All you have to do is take small steps, and take them consistently, for a period of 100 days. Below you’ll find 60 small ways to improve all areas of your life in the next 100 days. Home 1.

Ten Recent Advances in Evolution By Carl Zimmer Posted 10.26.09 NOVA To celebrate the 150th anniversary of the Origin of Species, here's a list—by no means exhaustive—of some of the biggest advances in evolutionary biology over the past decade. These advances include not just a better understanding of how this or that group of species first evolved, but insights into the evolutionary process itself. In some cases those insights would have given Darwin himself a pleasant jolt of surprise. Ten significant leaps forward in evolution research in the past decade, as chosen and described by noted science writer Carl Zimmer Enlarge Photo credit: (Earth) © NASA; (text) © WGBH Educational Foundation Darwin envisioned natural selection acting so slowly that its effects would be imperceptible in a human lifetime.

Materials Search Return to MERLOT II Home Page Search all MERLOT Click here to go to your profile Click to expand login or register menu 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.

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