News tagged with common ancestor
Unraveling the Chinese cabbage genome
Clues into the evolutionary diversification of brassicas have emerged from the draft Chinese cabbage genome sequence. Brassica crops include many agriculturally important vegetables, such as Chinese cabbage, ...
Jan 20, 2012 |
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I know something you don't know -- and I will tell you
Researchers found that wild chimpanzees monitor the information available to other chimpanzees and inform their ignorant group members of danger.
Dec 29, 2011 |
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'Animal embryo' fossils are actually microbes (Update)
Tiny fossils that scientists have thought for decades were the embryos of the earliest animals ever found have turned out to be the remains of much simpler microbial organisms.
Other Sciences / Archaeology & Fossils
Dec 22, 2011 |
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Shrimp-like crustacean found to make gooey underwater silk
(PhysOrg.com) -- Fritz Vollrath and colleagues from Oxford University have been analyzing the gooey material produced by tiny amphipods known as Crassicorophium bonellii, a small shrimp-like creature that p ...
Nov 23, 2011 |
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Of mice and men
(PhysOrg.com) -- How have humans and mice changed since we diverged about 75 million years ago from a small, furry common ancestor? Apart from the obvious, of course.
Nov 02, 2011 |
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Researchers build largest protein interaction map to date
Researchers have built a map that shows how thousands of proteins in a fruit fly cell communicate with each other . This is the largest and most detailed protein interaction map of a multicellular organism, demonstrating ...
Oct 27, 2011 |
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Last universal common ancestor more complex than previously thought
Scientists call it LUCA, the Last Universal Common Ancestor, but they don't know much about this great-grandparent of all living things. Many believe LUCA was little more than a crude assemblage of molecular parts, a chemical ...
Oct 05, 2011 |
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Humans, sharks share immune-system feature
A central element of the immune system has remained constant through more than 400 million years of evolution, according to new research at National Jewish Health. In the September 29, 2011, online version ...
Sep 30, 2011 |
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Fluid equilibrium in prehistoric organisms sheds light on a turning point in evolution
Maintaining fluid balance in the body is essential to survival, from the tiniest protozoa to the mightiest of mammals. By researching recent genomic data, Swiss researchers have found genetic evidence that links this intricate ...
Sep 22, 2011 |
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Not just skin deep -- CT study of early humans reveals evolutionary relationships
CT scans of fossil skull fragments may help researchers settle a long-standing debate about the evolution of Africa's Australopithecus, a key ancestor of modern humans that died out some 1.4 million years ...
Other Sciences / Archaeology & Fossils
Sep 19, 2011 |
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Dundee researchers make gene breakthrough
Researchers at the University of Dundee have made a significant breakthrough in understanding how human cells decode genes important for cell growth and multiplication.
Sep 16, 2011 |
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Sporulation may have given rise to the bacterial outer membrane: study
(PhysOrg.com) -- Bacteria can generally be divided into two classes: those with just one membrane and those with two. Now researchers at the California Institute of Technology (Caltech) have used a powerful ...
Sep 01, 2011 |
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King Tut and half of European men share DNA
According to a group of geneticists in Switzerland from iGENEA, the DNA genealogy center, as many as half of all European men and 70 percent of British men share the same DNA as the Egyptian Pharaoh Tutankhamun, ...
Aug 03, 2011 |
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New discovery places turtles next to lizards on family tree
(PhysOrg.com) -- Where do turtles belong on the evolutionary tree? For decades, the mystery has proven as tough to crack as the creatures' shells. With their body armor and retractable heads, turtles are such ...
Jul 20, 2011 |
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Japanese language traced to Korean Peninsula: study
Japan's many dialects originate in a migration of farmers from the Korean Peninsula some 2,200 years ago, a groundbreaking study borrowing the tools of evolutionary genetics reported Wednesday.
Other Sciences / Social Sciences
May 04, 2011 |
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Common descent
A group of organisms is said to have common descent if they have a common ancestor. In modern biology, it is generally accepted that all living organisms on Earth are descended from a common ancestor or ancestral gene pool.
A theory of universal common descent via an evolutionary process was proposed by Charles Darwin in his book On the Origin of Species (1859), and later in The Descent of Man (1871). This theory is now generally accepted by biologists, and the last universal common ancestor (LUCA or LUA), that is, the most recent common ancestor of all currently living organisms, is believed to have appeared about 3.9 billion years ago. The theory of a common ancestor between all organisms is one of the principles of evolution, although for single cell organisms and viruses, single phylogeny is disputed (see: origin of life).
In his book The Ancestor's Tale, Richard Dawkins uses the word concestor as a substitute for "common ancestor." This new word is very gradually entering scientific parlance.
For more information about Common descent, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
