Evolution

evolution
transformation of an organism such that descendants differ from their predecessors
Source: Jenkins, John B. 1990. Human Genetics, 2nd Edition. New York: Harper & Row ...
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Evolution is a Fact and a Theory
[Last Update: January 22, 1993]
hen non-biologists talk about biological evolution they often confuse two different aspects of the definition.
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Evolutionary developmental biology (often referred to as 'evo-devo' or evolution of development) is a field of biology that compares the developmental processes of different animals in an attempt to determine the ancestral relationship between ...
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Evolution of a Vision:
Genome Project Origins, Present and Future Challenges,
Far-Reaching Benefits ...
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Evolution and Adaptation
Index to this page
Natural Selection
The Measure of "Fitness" ...
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Evolution occurs whenever a new species of bacterium evolves that is resistant to antibiotics which had been lethal to prior strains.
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Evolution, which started out as a hypothesis, is now supported by evidence from many fields of science.
Fossils: Evidence of Past Life ...
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Australian Museum Evolutionary Biology Unit
Glossary of Terms
See the Glossary of Phylogenetic Systematics for a more complete listing and in depth discussion of terms ...
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Evolutionary biology is something of a meta field because it includes scientists from many traditional taxonomically-oriented disciplines.
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Evolutionary dead ends are very common in the human fossil record. In fact, there are people who would claim that we probably don't know any direct ancestors to Homo sapiens in that record.
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Evolution
: The process that results in heritable changes in a population spread over many generations (change in allele frequencies over time).
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A measurement of evolutionary time in nucleotide substitutions per year.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
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Chapter 9
Protease inhibitors and directed evolution: enhancing plant resistance to nematodes
Michael J.McPherson1 and David J.Harrison ...
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Evolution: the central principle of biology
Main article: Evolution
One of the central, organizing concepts in biology is that all life has descended from a common origin through a process of evolution.
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Evolutionary terminology
Adaptation: a condition or character which afford fitness to a species in a particular environment. Adaptive radiation: evolutionary divergence of members of a single phyletic line into many different niches.
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Evolutionary change on a grand scale, encompassing the origin of novel designs, evolutionary trends, adaptive radiation, and mass extinction.
macromolecule
[Gk. makros, large + L. dim. of moles, mass] ...
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Evolutionary diversification of a generalized ancestral form with production of a number of specialized forms by adaptation. See cladogenesis.
Related Terms: Evolution ...
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Evolution and Population Genetics (for on campus)
Evolution and Population Genetics (online lab version)
Exploring the Size of Organisms
History of Life
Prokaryotes ...
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evolutionary tree -- A diagram which depicts the hypothetical phylogeny of the taxa under consideration. The points at which lineages split represent ancestor taxa to the descendant taxa appearing at the terminal points of the cladogram.
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evolution: changes that occur within populations and organisms that make individuals able to adapt to their external environment.
exergonic reaction: a chemical reaction in which energy is released.
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EVOLUTIONARY CLOCK - Defined by the rate at which mutations accumulate within a given gene.
EXON The portion of a gene that is actually translated into protein (see INTRON, SPLICING).
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Evolution. The long-term process through which a population of organisms accumulats genetic changes that enable its members to successfully adapt to environmental conditions and to better exploit food resources.
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Evolutionary Footprinting: One can infer which portions of a gene are important by comparing the sequence of that gene with its cognates from other species.
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Evolution changes over time in the percentages or frequencies of the various alleles of the genes in a population
(evolut = an unrolling) ...
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evolution Change over time. Organic or biological evolution is a series of changes in the genetic composition of a population over time. See also natural selection and punctuated equilibrium model.
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Evolutionary Clock: Defined by the rate at which mutations accumulate within a given gene.
Evolutionarily conserved: See conserved sequence.
Exogenous DNA: DNA originating outside an organism.
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In the evolutionary sense, some heritable feature of an individual's phenotype that improves its chances of survival and reproduction in the existing environment.
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Directed evolution
This term is used in two ways. (i) A laboratory process using mechanisms of natural selection to produce mutants adaptated to defined environmental challenges.
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Evidence of Evolution
Use comparative embryology, molecular biology, anatomy, and fossil record to show probably evolutionary relationships.
- ...
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deuterostome
An evolutionary line of coelomates (ex. echinoderms and chordates) that are characterized by radial, indeterminate cleavage and development of the anus from the blastopore.
Covered in Lab 13 Animal Diversity III ...
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The evolution of new species or sub- species to fill unoccupied ecological niches. Aerobe. A microorganism that grows in the presence of oxygen. See Anaerobe. Agarose gel electrophoresis.
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The theory that introns serve an evolutionary function in allowing the shuffling of exons is still being debated.
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A tree-like diagram showing evolutionary relationships. Any two branch tips sharing the same immediate node are most closely related.
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Genus, Genera (pl.): A group of evolutionarily related species, sharing one or a number of characteristics.
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analogous structures - structures having similar function or superficial appearance, but not necessarily sharing a common evolutionary origin (contrast with homologous structures).
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Scientists regard these cross species similarities as evidence that a specific gene performs some basic function essential to many forms of life and that evolution has therefore conserved its structure by permitting few mutations to accumulate in it.
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