http://www.youtube.com/watch?v=lIEoO5KdPvg
Related: Evolution • Evolution • Genetyka i EwolucjonizmApe-like face of early human ancestor revealed The ape-like face of one of our earliest known ancestors has been revealed for the first time, thanks to the discovery of a nearly complete skull in Ethiopia. The cranium – the skull minus its lower jaw – belongs to Australopithecus anamensis, and its owner lived in the Afar basin in Ethiopia around 3.8 million years ago. Australopiths are thought to be the direct ancestors of the early members of our own genus, Homo, which arose with Homo habilis roughly 2.4 million years ago. Several Australopith species have been identified.
Click and Clone This page has content that requires the Flash Player plug-in. Unfortunately, we can't do anything on our end to improve your experience with Flash. If you are using an iOS device, please note that these devices do not support Flash. We are slowly working on replacing our popular Flash-based content and will update this content as it becomes available. If you would like to help us as we work on these updates, please consider donating here. Abiogenesis Abiogenesis is the process by which life arises naturally from non-living matter. Scientists speculate that life may have arisen as a result of random chemical processes happening to produce self-replicating molecules. One of the popular current hypotheses involves chemical reactivity around hydrothermal vents.[1][2] This hypothesis has yet to be empirically proven although the current evidence is generally supportive of it. History: spontaneous generation[edit] Before recent centuries, it was widely believed that abiogenesis happens all around us, that many individual present-day organisms had originated from nonliving matter. Frogs and mice seem to come from mud, and maggots from rotting meat.
Virtual Bioengineer Simulations – Amino Labs What is genetic engineering? How do you do genetic engineering? What is Bioart? First detection of sugars in meteorites gives clues to origin of life www.nasa.gov/press-release/god … sugars-in-meteorites An international team has found sugars essential to life in meteorites. The new discovery adds to the growing list of biologically important compounds that have been found in meteorites, supporting the hypothesis that chemical reactions in asteroids—the parent bodies of many meteorites—can make some of life's ingredients. If correct, meteorite bombardment on ancient Earth may have assisted the origin of life with a supply of life's building blocks. The team discovered ribose and other bio-essential sugars including arabinose and xylose in two different meteorites that are rich in carbon, NWA 801 (type CR2) and Murchison (type CM2). Ribose is a crucial component of RNA (ribonucleic acid).
The GENETICS Project - UW Genome Sciences Education Outreach Through the GENETICS Project, we developed instructional materials for teaching genetic concepts at the elementary, middle school, and high school levels. Instructional Materials for the Elementary and Middle School Levels Through Amazing Cells, students use microscopes to examine household items and develop an understanding of scale. They look at cells and learn that cells are the building blocks of living things. State Your Traits is an introductory activity that leads students to learn about genetic variation through examination of some of their own genetic traits. Traits Handout depicts several genetic traits examined in State Your Traits.
Neanderthal Skeleton May Shed Light to How Cavemen Feel About the Dead Neanderthal Skeleton May Shed Light to How Cavemen Feel About the Dead Staff ReporterFeb 20, 2020 07:31 AM EST Close (Photo : Pixabay/sgrunden)The discovered remains with pollen around it may suggest that Neanderthals bury their dead with compassion by adding symbols like flowers. Biology - The study of the origin of life Spontaneous generation If a species can develop only from a preexisting species, then how did life originate? Among the many philosophical and religious ideas advanced to answer that question, one of the most popular was the theory of spontaneous generation, according to which, as already mentioned, living organisms could originate from nonliving matter. With the increasing tempo of discovery during the 17th and 18th centuries, however, investigators began to examine more critically the Greek belief that flies and other small animals arose from the mud at the bottom of streams and ponds by spontaneous generation. Then, when Harvey announced his biological dictum ex ovo omnia (“everything comes from the egg”), it appeared that he had solved the problem, at least insofar as it pertained to flowering plants and the higher animals, all of which develop from an egg.
Understanding evolutionary relationships The Tree Room : Primer on Trees : Understanding evolutionary relationships So how do you tell which organisms on a tree are most closely related to one another? It's tempting to focus on the order of the branch tips on a tree (i.e., which lineage goes to the right and which goes to the left), but in fact, this ordering is not meaningful at all. Instead, the key to understanding evolutionary relationships is common ancestry. Common ancestry refers to the fact that distinct descendent lineages have the same ancestral lineage in common with one another, as shown in the diagram below. Introduction to Human Evolution Human evolution Human evolution is the lengthy process of change by which people originated from apelike ancestors. Scientific evidence shows that the physical and behavioral traits shared by all people originated from apelike ancestors and evolved over a period of approximately six million years. One of the earliest defining human traits, bipedalism -- the ability to walk on two legs -- evolved over 4 million years ago.
Debunking Creationism: "Transitional Fossils Don't Exist!" — A Skeptical Human The final point I'll make is that this is yet another example of creationists operating with a huge double standard. In the case of evolution, they have the most exacting standards: They want common ancestors perfectly preserved; they demand more and more transitional fossils, like a person with a never-ending appetite. Whatever evidence they can ask for, they do ask for—and it's seemingly never enough for them. Then, when it comes to their religious beliefs, they say: "Oh, I take it on faith. This ancient religious book says so, and even though it contradicts the hundreds of other religions in the world, I choose to believe. Stories of miracles?
No, a Mitochondrial "Eve" Is Not the First Female in a Species Recently, researchers made waves with the announcement that they had found the mother of all sperm whales: that is, the female from whom all modern sperm whales are descended. "Sperm Whales Have an ‘Eve,’” ran the news headlines, capitalizing on the biblical idea of the “first woman.” The idea of a mitochondrial "Eve” is not new; researchers often use it to refer to the first female genetic ancestor of a species. The problem is, most people misunderstand exactly what the term means, thinking it means the very first female in a species.
The Mitochondrial Eve: Have Scientists Found the Mother of Us All? MHRC In 1987, A world wide survey of human mitochondrial DNA (mtDNA) was published by Cann, Stoneking, and Wilson in Nature magazine. Its main point was that "all mitochondrial DNAs stem from one woman" and that she probably lived around 200,000 years ago in Africa. When the media picked up from Wilson, one of the authors of the paper, that they had found the "Mitochondrial Eve" or "African Eve", the story became a sensation. Have scientists found "the mother of us all"? Most people know about the nuclei of cells and that the genetic inheritance from both parents are found in the nucleus.
Cyanide compounds discovered in meteorites may hold clues to the origin of life Cyanide and carbon monoxide are both deadly poisons to humans, but compounds containing iron, cyanide, and carbon monoxide discovered in carbon-rich meteorites by a team of scientists at Boise State University and NASA may have helped power life on early Earth. The extraterrestrial compounds found in meteorites resemble the active site of hydrogenases, which are enzymes that provide energy to bacteria and archaea by breaking down hydrogen gas (H2). Their results suggest that these compounds were also present on early Earth, before life began, during a period of time when Earth was constantly bombarded by meteorites and the atmosphere was likely more hydrogen-rich. "When most people think of cyanide, they think of spy movies—a guy swallowing a pill, foaming at the mouth and dying, but cyanide was probably an essential compound for building molecules necessary for life," explained Dr. Karen Smith, senior research scientist at Boise State University, Boise, Idaho.