Radical in Biological Definition

Charles Darwin

... of the Firth of Forth where Grant found evidence for homology , the radical theory that all animals had similar organs differing only in complexity. ... of evolution , but vividly aware that transmutation was associated with radical democratic agitators seeking to overthrow society and publication could ...

Chemiosmotic hypothesis

... across the mitochondrial membrane and that this energy was used by a reversible proton pump , the ATP synthase , to create ATP . This was a radical proposal at the time, and not well accepted. The prevailing view was that the energy of electron transfer was stored as a stable high potential ...

Down syndrome

... peroxidase ), the cells will suffer from a peroxide damage. Some scientists believe that the treatment of Down syndrome neurons with free radical scavengers can substantially prevent neuronal degeneration . Oxidative damage to neurons results in rapid brain aging similar to that of ...

Human

... story in which Adam is explicitly given dominion over the Earth and all of its creatures. Alongside such claims of dominance we often find radical pessimism because of the frailty and brevity of human life . In the Hebrew Bible, for example, dominion of man is promised in Genesis 1:28, but ...

Kidney

... Medical terminology Medical terms related to the kidneys either involve the prefixes renal or nephro- . Surgical removal of the kidney is a radical nephrectomy . See also Urology Nephrology Human anatomy ...

Lynn Margulis

... DNA of the cell. This prediction was actually proven in the 1980's in mitochondria, centrioles, and chloroplasts." [2] She was criticized as a radical and her scientific work was rejected by mainstream biology for many years. Her work has more recently received widespread support and acclaim. ...

Natural selection

... Darwin. Edward Blyth had also proposed natural selection, as a mechanism of keeping species constant. Impact of the idea Perhaps the most radical claim of Darwin's theory of evolution through natural selection is that "elaborately constructed forms, so different from each other, and dependent ...

Oxidative phosphorylation

... Several highly reactive, transient oxygen derivatives can be formed during this process: Hydrogen peroxide Superoxide anion Hydroxyl radical ...

Punctuated equilibrium

... Gould's advocacy of the theory brought punctuated equilibrium much attention, especially since they phrased it in terms that made it appear to be a radical re-thinking of evolutionary theory. This was used by some creationists to argue that the theory of evolution is based on questionable grounds. ...

Signal transduction

... diacylglycerol . Others are ceramide and lysophosphatic acid . Nitric oxide (NO) as second messenger The gas nitric oxide is a free radical which diffuses through the plasma membrane and affects nearby cells. NO is made from arginine and oxygen by the enzyme NO synthase , with ...

Species

... and compelling theory of evolution . Basically, Darwin argued that it is populations that evolve, not individuals. His argument relies on a radical shift in perspective from Linnaeus: rather than defining species in ideal terms (and searching for an ideal representative and rejecting deviations), ...