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Change in Biological Dictionary

Turgor

... is an abnormality in the skin's ability to change shape and return to normal (elasticity) Skin ... is an abnormality in the skin's ability to change shape and return to normal (elasticity) Skin ... is an abnormality in the skin's ability to change shape and return ... Skin with normal turgor ...

Structural change

... Structural change of an economy refers to a long-term widespread change of the fundamental structure, rather than ... economy is liberalized. A current structural change in the world economy is globalization. This ...

Punctuated equilibrium

... species will experience little evolutionary change for most of their geological history . When ... punctuated equilibrium , species usually change little as, "gradual change ... Introduction to Stephen Jay Gould and ...

Mutation

... ... In biology, mutation is a sudden change in the base pair sequence of the genetic ... ... of natural ... A mutation is a permanent change in the DNA sequence of a gene. Mutations in a ... ... A mutation is any spontaneous heritable change in DNA sequence that contributes ... A neutral ...

Macroevolution

... gene pools. Macroevolutionary studies focus on change that occurs at or above the level of species, in ... ... Microevolution and macroevolution encompass change at very ... punctuated equilibrium, extinctions, ... of macroevolution would be the slow progressive change ... Macroevolution is a large-scale and ...

Hyperpolarization

... Hyperpolarization is a change in a cell's membrane potential that makes it ... the neuron is said to be polarized. Any change in membrane potential tending to make ... ... of the membrane decreased or caused no apparent change in 5-HTD. ... The hyperpolarization was ...

Genetic drift

... Genetic drift or allelic drift is the change in the relative frequency with which a gene ... genetics, genetic drift is the phenomenon of change in the ... Genetic drift —along with mutation, ... one of ... Genetic drift is the random change in the frequency of alleles in a population .....

Gene frequency

... ... Genetic drift or allelic drift is the change in the relative frequency with which a gene ... (genetics), Processes of gene - frequency change ... of the topic gene - frequency are discussed ... allele is as a proportion ... How does a change in gene frequency come about? ... Back to ...

Exergonic reaction

... reaction is a chemical reaction where the change in the Gibbs free energy is negative, indicating ... reaction is a chemical reaction where the change in the Gibbs free energy is negative, [ 1 ] ... reactions ... In an exergonic reaction the change is free energy is represented by a negative ... ...

Denaturation

... Denaturation (biochemistry), a structural change in macromolecules caused by extreme conditions ... diet and health ... denaturation , protein A change in the structure of protein by heat, acid, alkali, ... Denaturation is the major change in protein or nucleic acid structure by ... 2 ...

Capacitation

... ) ( physiology ) The process of physiological change occurring in mammalian spermatozoa during passage ... training in medical embryology ... The first change in this cascade is capacitation . ... ... During capacitation , the spermatozoa undergo a change in motility pattern, a ... After ejaculation, ...

Antigenic shift

... ′ shift ) ( virology ) An abrupt major change in the antigenicity of a virus; believed to result from Illustration demonstrating the genetic change that enables a flu strain to jump from one ... and Prevention (CDC) ... The other type of change is called " antigenic shift . ... Antigenic ...

Allele frequency

... ... Genetic drift or allelic drift is the change in the relative frequency with which a gene ... we recalculated LD ... ... concerned about the change in allele frequency in a population. ... in ... databases. ... Allele frequencies can change in a population over time, depending on the ' .....

VNTR

... tuberculosis MIRU- VNTR (MLVA)-, Spoligo-, RD (LSP)-, and SNP-data. ... change VNTR loci set. 24 loci. change VNTR loci order ... Definition of VNTR from Merriam-Webster's ...

Translocation

... case of translocation in which two segments translocation n. A change of location. Genetics. A transfer of a chromosomal segment to a new ... genetic diagnosis (pgd) facility. ... A translocation is a change in chromosome structure in which chromosomes are ... Britannica ...

Silent Mutation

... Silent mutations are DNA mutations that do not result in a change to the amino acid sequence of a protein. They may occur in a ... been torn down, ... ... will still encode leucine, so no discernable change occurs (a silent mutation ) ... The phrase silent mutation is often ...

Population genetics

... genetics is the study of the allele frequency distribution and change under the influence of the four evolutionary processes: natural selection, ... of ... Population genetics is the study of the distribution of and change in allele ... Population genetics was a vital ingredient in the ...

Point Mutation

... summaries, research information, and more. ... A point mutation is a change in a single ... POINT MUTATION MECHANISM: ERROR-PRONE DNA ... mean? ... point mutation . Etymology: L, punctus, pricked, mutare, to change ... Point mutations are often caused by chemicals or malfunction of ...

Nonsense Mutation

... is changed in the DNA strand. ... In biology, mutation is a sudden change in the base pair sequence of ... Nonsense mutations . Nonsense ... "missense" mutations ; these can lead to ... Nonsense mutation . A change of an amino acid-coding codon to a stop codon. ... nonsense mutation ....

Nerve impulse

... about nerve impulse in the free online ... the local voltage change across the cell wall as a nerve impulse is transmitted ... Nerve ... differs entirely from electromagnetic ... The nerve impulse is a sharp change of the membrane potential. ... As we have noted before, a nerve ...

Morphometrics

... ... Morphometrics 1 is a field concerned with studying variation and change in the ... Other sites. • Archive of meetings, workshops, & ... Wall Thickness. CIB Research ... Rib Morphometrics . Size and Shape change of the Human Rib Cage ... Zoology information, history, articles and ...

Microevolution

... allele frequencies in a population, over a few generations, also known as change below the species level . These are all examples of microevolution ... things, but they involve mostly ... Microevolution is defined as the change of allele frequencies (that is, genetic ... In evolutionary biology ...

Hydrostatic skeleton

... pressure of the fluid and action of the surrounding muscles are used to change an organism's shape and produce movement, such as burrowing or ... balloon. ... These animals use the hydrostatic skeleton to change the shape of their body ... A hydrostatic skeleton or hydroskeleton ...

Hereditary Unit

... article about Genes. Information about Genes in the Columbia ... change in a gene , or unit of hereditary material, that can alter an ... Encyclopedia article about cistron. Information about cistron in the ... change in a gene , or unit of hereditary material, that can alter an ...

Evolution

... In biology, evolution is change in the genetic material of a population of organisms from one ... to evolution . Introduction Evolution is most commonly defined as a change in allelic ... 5 Evolution at multiple levels: micro to macroevolution. ...

Epigenetic

... ... Epigenetic patterns are so sensitive to environmental change that, in the case ... Indeed, the epigenetic lability of Jirtle's agouti ... blood was analyzed for epigenetic differences. ... When epigenetic change results from consumption of certain foods/compounds, it ... The term " ...

Endergonic reaction

... an endergonic reaction is a chemical reaction in which the standard change in free energy is positive, and energy is absorbed. In layman's terms ... ... An endergonic reaction is a chemical reaction in which the change in ... ... endergonic on Find.com. Stop searching for endergonic - ...

DNA gyrase

... cut both strands of the DNA helix simultaneously in order to change the linking number of the molecule. Information about DNA gyrase in ... Quinolone binding to the gyrase - DNA complex induces a conformational change that ... DNA gyrase is the intracellular target of the quinolone group ...

Concentration gradient

... . Diffusion ... Concentration gradient : is a regular concentration change over a distance in a ... It is significant because a concentration ... exists in biological systems, ... concentration gradient - change in concentration of a solute across distance, as a gradient ... having ...

Apical meristem

... that apical meristem refers to the part of the ... Signals that change the fate of the apical meristem include: maturity of the plant; ... ... floral meristem . Structure of the Flower. The ABC Model ... Signals that change the fate of the apical meristem include: ... Cabbage: An Enlarged ...

Anagenesis

... Anagenesis is the progressive evolution of species involving a change in gene ... Modes: anagenesis - catagenesis - cladogenesis ... ... Five" ... In general biology, anagenesis is an evolution ary change producing a single ... Anagenesis accounts for why most organisms do not ...

Adaptation

... ... Implementing adaptation ... Adapting to or coping with climate change may therefore become necessary in ... Government of Canada, Climate Impacts and Adaptation Program ... Adaptation to Climate Change. Climate change poses great challenges to society. ... Identifying financing for ...

Wobble base pair

... stability of a wobble base ... Wobble base pair , a type of basepair in genetics translation. Milankovitch wobble , the change in the axial tilt, axial precession and orbital ... base pair n. The pair of nitrogenous bases, consisting of a purine linked ... bonds, ...

Viability

... search ... viability (uncountable) the property of being viable ; the ability to ... A real estate guide showing cities affected by the climate change of Year Zero. Site also offers advice on how to sell property in a particular area or whether or ... Viability summary with 2 pages of ...

Ventral root

... ... Dorsal ( Root , Ganglion, Ramus) · Ventral ( Root , Ramus) · Sympathetic trunk ... With the other three proteins, most of the detectable change occurred in the ventral root only. ... total RNA synthesis altered after ventral root transection? ... Ventral - Definition of Ventral ...

Umbilical cord

... a diameter of 1-2 cm and 11 ... They are in the blood of the umbilical cord and placenta. ... Will donating my baby's umbilical cord blood change my delivery experience? ... Empowered Childbirth is a community of women sharing their birthing wisdom ... Cutting your newborn's umbilical ...

Transversion

... only be reverted by a spontaneous reversion. Because this type of mutation changes the chemical structure dramatically, the consequences of this change tend to be more severe and less common than that of transitions.Transversions can be caused ... transversion n. A point mutation in which a ...

Transposition

... around to different positions within the genome of a single cell, a process called transposition . In the process, they can cause mutations and change the amount of DNA in ... Transposition (mathematics), a permutation which exchanges two elements and ... Transposition (law), the ...

Transformed phenotype

... Transformed and Normal Human Cells ... Genetics of Cell Transformation by Simian Virus 40. ... ... the goal of genetic transformation is to change an organism's traits ( phenotype ). Before any ... transformation ) phenotype must be made. ... ... restoration of a more normal or benign ...

Transcapsidation

... of the nucleic acid of one virus with a coat protein of a differing virus. ... transcapsidation ( ¦tranz′kapsə′dāshən ) ( virology ) change in the capsid of PARA (particle aiding replication of adenovirus) from one type of capsid n. The protein shell that surrounds a virus ...
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