Evolution
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  Evolution



Evolution

   The continuing process of change, especially in reference to natural selection.

RELATED TERMS
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Natural
Not human-induced or manmade.



SIMILAR TERMS
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Evolution, biologic
Biologic evolution was contrasted with cultural (social) evolution in 1968 by A.G. Motulsky who pointed out that biologic evolution is mediated by genes, shows a slow rate of change, employs random variation (mutations) and selection as agents of change, new variants are often harmful, these new variants are transmitted from parents to offspring, the mode of transmission is simple, complexity is achieved by the rare formation of new genes by chromosome duplication, biologic evolution occurs with all forms of life, and the biology of humans requires cultural evolution.

Evolution, Chemical
Chemical and physical transformation of the biogenic elements from their nucleosynthesis in stars to their incorporation and subsequent modification in planetary bodies and terrestrial biochemistry. It includes the mechanism of incorporation of biogenic elements into complex molecules and molecular systems, leading up to the origin of life.

Evolution, Cultural
The continuous developmental process of a culture from simple to complex forms and from homogeneous to heterogeneous qualities.

Evolution, Directed Molecular
Techniques used to produce molecules exhibiting properties that conform to the demands of the experimenter.

Evolution, Molecular
Evolution at the molecular level of DNA sequences and proteins. (Rieger et al., Glossary of Genetics: Classical and Molecular, 5th ed)

Evolution, Molecular, Directed
Techniques used to produce molecules exhibiting properties that conform to the demands of the experimenter.

Evolution, Planetary
Creation and development of bodies within solar systems, includes study of early planetary geology.

Evolutionarily conserved gene
A gene that has remained essentially unchanged throughout evolution. Conservation of a gene indicates that it is unique and essential. There is not an extra copy of that gene with which evolution can tinker. And changes in the gene are likely to be lethal.

Evolutionarily conserved sequence
A base sequence in a DNA molecule (or an amino acid sequence in a protein) that has remained largely unchanged throughout evolution.

Evolutions
The process of cumulative change over successive generations through which organisms acquire their distinguishing morphological and physiological characteristics.

Evolutions, Chemical
Chemical and physical transformation of the biogenic elements from their nucleosynthesis in stars to their incorporation and subsequent modification in planetary bodies and terrestrial biochemistry. It includes the mechanism of incorporation of biogenic elements into complex molecules and molecular systems, leading up to the origin of life.

Evolutions, Cultural
The continuous developmental process of a culture from simple to complex forms and from homogeneous to heterogeneous qualities.

Evolutions, Directed Molecular
Techniques used to produce molecules exhibiting properties that conform to the demands of the experimenter.



PREVIOUS AND NEXT TERMS
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Evening primrose oil
A natural source of essential fatty acids (EFOs). Evening primrose oil contains a higher level of arachnoidic acid than some other EFO sources, so people with seizure disorders may wish to avoid its use.

Event
A set of outcomes. Cardiovascular events might include a heart attack and gastrointestinal events a GI bleed. The use of the term "event" in medicine comes from probability theory.

Evert
To turn outward or turn inside out. To evert the foot is to move its forepart away from the midline of the body. To evert a hollow organ is to turn it inside out.

Evertor
A muscle that turns a part toward the outside. To evert is to turn outward or turn inside out.

Evidence-based medicine
The judicious use of the best current evidence in making decisions about the care of the individual patient. Evidence-based medicine (EBM) is mean to integrate clinical expertise with the best available research evidence and patient values.

Evolution

Evolution, biologic
Biologic evolution was contrasted with cultural (social) evolution in 1968 by A.G. Motulsky who pointed out that biologic evolution is mediated by genes, shows a slow rate of change, employs random variation (mutations) and selection as agents of change, new variants are often harmful, these new variants are transmitted from parents to offspring, the mode of transmission is simple, complexity is achieved by the rare formation of new genes by chromosome duplication, biologic evolution occurs with all forms of life, and the biology of humans requires cultural evolution.

Evolutionarily conserved gene
A gene that has remained essentially unchanged throughout evolution. Conservation of a gene indicates that it is unique and essential. There is not an extra copy of that gene with which evolution can tinker. And changes in the gene are likely to be lethal.

Evolutionarily conserved sequence
A base sequence in a DNA molecule (or an amino acid sequence in a protein) that has remained largely unchanged throughout evolution.

Ewing sarcoma
A type of bone tumor that occurs in children and adolescents, most often in the large bones of the arms and legs and the flat bones of the pelvis, spine and ribs. The tumor is caused by a chromosome abnormality, called a translocation (an exchange of material), most commonly between chromosomes 11 and 22 that occurs by chance alone in a single cell which divides to form the malignant clone (colony) of cells.

Exacerbation
A worsening. In medicine, exacerbation may refer to an increase in the severity of a disease or its signs and symptoms. For example, exacerbation of asthma is one of the serious effects of air pollution.

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