More Family History Products. Epigenetics. Epigenetics. The Trouble with Epigenetics (Part 1) “You keep using that word.
I do not think it means what you think it means”. Gene Control. Genes & Development. Five Fingers of Evolution. In his talk, Paul Andersen explains the five causes of microevolution.
Research one example for each cause in the human population. Use the following population simulator to simulate microevolution: Run the simulation using the default settings. Note the change in gene frequencies due to chance.
What-is-Life.pdf (application/pdf Object) Profile on TED.com. Lee Cronin: Making matter come alive. The Cronin Group. Recent Publications 284. Assembly and core transformation properties of two tetrahedral clusters: [FeIII13P8W60O227(OH)15(H2O)2]30- and [FeIII13P8W60O224(OH)12(PO4)4]33-, P. I. Molina, H. N. The Observer. Life looks increasingly like a chemical experiment that took over the laboratory.
All living things turn to dust and ashes when they die, or, to put it another way, to constituent atoms and molecules of hydrogen, oxygen, carbon, phosphorus and so on. But, in another sense, living things do not die: they begin again, from a tiny cell, and scavenge the dust, the air and water, to find the elements necessary to fashion an aspidistra, an elephant, or an attorney-general, using only the raw materials to hand and energy from a thermonuclear reactor 93 million miles away. Scientists take first step towards creating 'inorganic life' Scientists at the University of Glasgow say they have taken their first tentative steps towards creating 'life' from inorganic chemicals potentially defining the new area of 'inorganic biology'.
Professor Lee Cronin, Gardiner Chair of Chemistry in the College of Science and Engineering, and his team have demonstrated a new way of making inorganic-chemical-cells or iCHELLs. Prof Cronin said: "All life on earth is based on organic biology (i.e. carbon in the form of amino acids, nucleotides, and sugars, etc.) but the inorganic world is considered to be inanimate. "What we are trying do is create self-replicating, evolving inorganic cells that would essentially be alive. You could call it inorganic biology. " The cells can be compartmentalised by creating internal membranes that control the passage of materials and energy through them, meaning several chemical processes can be isolated within the same cell -- just like biological cells. [1105.5033] Molecular Codes in Biological and Non-Biological Reaction Networks. Inorganic Biology.
Image credit: colourdance.deviantart.com.
High Quality Visualization of <br> Biochemical Pathways in BioPath. Meaning of life. Questions.
The Big Question: Why Are We Here? Life Coaching, Live Events & Personal Development.
Earth Paradigm. Abiogenesis. Scientific hypotheses about the origins of life can be divided into a number of categories.
Many approaches investigate how self-replicating molecules or their components came into existence. On the assumption that life originated spontaneously on Earth, the Miller–Urey experiment and similar experiments demonstrated that most amino acids, often called "the building blocks of life", can be racemically synthesized in conditions which were intended to be similar to those of the early Earth. Several mechanisms have been investigated, including lightning and radiation. Other approaches ("metabolism first" hypotheses) focus on understanding how catalysis in chemical systems in the early Earth might have provided the precursor molecules necessary for self-replication. Early conditions Timeline of evolutionary history of life. Visual representation of the history of life on Earth as a spiral The dates given in this article are estimates based on scientific evidence.
Basic timeline In its 4.6 billion years circling the sun, the Earth has harbored an increasing diversity of life forms: Timeline of human evolution. Poster Downloads. Classroom Resource Poster: Viral Diversity … run in the millions.
Ancestral Lines. Evolutionary biologists use a cladogram, the treelike diagram of evolutionary branches or clades, to organize species into lines of evolutionary descent across time.
Biologists use three types of evidence to deduce evolutionary connections: genetics, morphology, and geologic dating. (Behavior, normally a key part of evolutionary studies, can only be inferred in extinct species — for example, by examining the ecology in which the species flourished and the species adaptations for eating and locomotion.) Analyses of primate fossils and the genetic relatedness of living primates converge to the conclusion that humans and chimpanzees branched from a common ancestor about 7 million years ago. DNA recovered from several uncontaminated Neanderthalensis fossils indicated that modern humans and extinct neanderthals diverged about 400,000 years ago; but more recent studies show that they must have interbred within Europe or the Middle East since then. Has the ‘Human Epoch’ Begun and is a Mass Extinction Near? Nature Published on December 30th, 2010 | by Michael Ricciardi. Day One.
The meeting began with a brief introduction by John Dupré. The first speaker was Ford Doolittleof the Dept. of Biochemistry and Molecular Biology at Dalhousie University here in Halifax. His title was The Tree of Life, from three sides now. Ford introduced the topic from three perspectives: science, philosophy, and politics. The science is straightforward.