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...l . Full article >>> In response to changes in redox and growth conditions, 121 genes out of the 691 arrayed ORFs displayed at least a 2-fold difference in transcript abundance in wild-type S. oneidensis MR-1. Full article >>> One way to do this is to replace the wild-type ......eakage and realignment: Quite often these types of changes do not affect the viability of the organ ism (the genes are still there; they're just in different places) but, in sexual ly reproducing species , ... Full article >>> Biotic ecological factors also influence biocenose viability ...... ventricle that moves in response to the pressure changes of ventricular contr action . 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 ... Full article >>> The anterior chamber of the early embryo 's heart which functions to connect the ventricle to the ventral aorta . Synonyms: ......erived. Full article >>> phenotypic changes in the fetal vasculature, resulting in alterations in the L-arginine/NO signalling pathway and regulation of [Ca2+]i. These alterations may have significant implications for long -term programming of the fetal cardio vascular system . Full article ......ed. Full article >>> Similar C to U changes have been detected among transcript s of mitochondria l and chloroplast DNA s of vascular plants . U to C changes, produced by an as yet unknown mechanism, appear to occur in the mitochondria l RNA of Pteridophytes. Full article >>&#......anent genetic change in a cell . Does not include changes occurring during normal genetic recombination . Full article >>> P urine analogs These are relatives of the p urine s used in DNA synthesis. Because they interfere with DNA synthesis, they interfere with the rapid cell prol......es have remained uniform over time and that slight changes over long periods can have large- scale consequences; proposed by James Hutton in 1795 and re? Full article >>> Unicellular or multicellular photosynthetic eukaryotes that generally lack roots , stems, leaves, conducting vesse......a direct target of natural selection rather than changes in the DNA sequence enduring over generations being a result of the latter; for example, silent transition - transversion combinations would alter the melting point ... Full article >>>......embrane by undergoing a series of conformation al changes ... Full article >>> active transport A process that requires an expenditure of ATP energy to move molecule s across a cell membrane ; usually moved against the concentration gradient with the aid of specific transport protein......>>> transformation - morphological changes in a lymph ocyte associated with the onset of division . Also used to denote the change to the autonomously dividing state of a cancer cell ... Full article >>> Transformation . In prokaryotes , the natural or induced uptake an......article) notes that the paper does not address the changes in musculature, tongue morphology and behavior that must accompany the change in bill morphology . Full article >>> It had never been described before. A lot of people still call it the "deer tick," although that's technically not...... Alfred Russell Wallace on how some evolution ary changes occur. Full article >>> ( theory of kin selection ): In an altruistic act, if the donor sustains cost C, and the receiver gains a benefit B as a result of the altruism , then an allele that promotes an altruistic act in the donor ...... of hemoglobin . Thalassemia s that result from changes in splicing signals have been character ized. Full article >>>......62;> We are developing technology to monitor changes protein expression in single tetrad s of D. radiodurans following exposure to ionizing radiation. Full article >>> However, the alignment of chromosomes for prophase is different. Homologous chromosomes join into tetrad s (......oceans Halocline. Depth zone within which salinity changes maximally ... Full article >>> The rate of divergence between taxon omic groups measurable as amino acid substitution s per million years. 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 ... Full article >>>...... Full article >>> A mutation that changes an amino acid codon to one of the three stop codon s, resulting in a shorter and usually nonfunctional protein . noradrenaline ... Full article >>> : A DNA segment coding for a specific polypeptide , and includes its own sta......atic organ isms that have restricted tolerance to changes in environment al saltwater concentration. stenophagous Eating few kinds of foods. Full article >>> Once inside the stele , water is again free to move between cells as well as through them. In young roots , water enters directly ...... site s to go through a series of conformation al changes ... Full article >>> At least one fish has its luminescent organ located at the tip of a protruding stalk and uses it as bait to lure prey within reach of its jaws. Full article >>> But the real damage is done when t......he seminiferous tubules that undergo a series of changes and then meiosis to yield sperm cells . sperm cells : haploid cell s within the male testes . Full article >>> spermatogonia [Gk. sperm a, seed + gonos, a child, the young] The unspecialized diploid (2n) cells on the wal......he seminiferous tubules that undergo a series of changes and then meiosis to yield sperm cells . sperm cells : haploid cell s within the male testes . Full article >>> Sperm and eggs are made from special cells called germ cells . (The word "germ" is from the Latin word for " ......sor genes in skin cell s; cigarette smoke causes changes in lung cells , making them more sensitive to carcinogenic compound s in smoke. Full article >>> These intermediates have been shown to be involved in various biological effects in culture d human skin cell s (e.g. cell death......ngth) occurs in the DNA sequence . When there are changes between sequence s, a recognition site may appear or be lost. Full article >>> Did you ever wonder what words are being searched for in relation to your web site . No you do not have to wonder, and it is entirely free. In addition ......>> Silent mutation A mutation which changes the nucleotide sequence but does not cause a detectable change in the phenotype . Full article >>> silent mutation A permanent genetic change, but one that is never express ed by the phenotype . silica (SiO3) A mineral similar......2;> Sequence polymorphism which results in changes in the restriction map . Other Resources PubMed Google ... Full article >>> Sequence Polymorphism : See Polymorphism . Sequence similarity : Similarity in nucleic acid or polypeptide sequence s, particularly in shorter segm......th) occurs in the DNA sequence . When there are changes between sequence s, a recognition site may appear or be lost. Full article >>> translation : the process by which the genetic code is trans ferred to an amino acid sequence in a protein . tricuspid valve : a valve that pas...non sense mutation a mutation that changes a codon from one that specifies an amino acid ...>> Non sense mutation Mutation that changes a codon or an amino acid to a termination or stop codon and leads to premature termination of ......secondary oocyte , triggering a series of chemical changes in the outer oocyte membrane that prevent any other sperm from entering the oocyte. Full article >>> Completion of meiosis II converts the secondary oocyte into a fertilized egg or zygote (and also a second polar body ). As ......ny new functional units that reflect single gene changes (Rinchik et al. 1990; Rinchik et al. 1995). Full article >>>......sin. When rhodopsin absorbs light, the retina l changes shape and dissociates from the opsin, after which it is converted back to its origin al form. ribonucleic acid ( RNA ) ... Full article >>> central cylinder of united vascular bundles in the roots and stems of dicot yledonous ......sin. When rhodopsin absorbs light, the retina l changes shape and dissociates from the opsin, after which it is converted back to its origin al form. Full article >>> rhodopsin A visual pigment contained in the rods of the retina in the eye.. Full article >>> rhodopsi...... ( RFLP ) Sequence polymorphism which results in changes in the restriction map . Other Resources ... Full article >>> Dr. Francis Collins, director of the National Human Genome Research Institute, defines restriction fragment length polymorphism ( RFLP ). related terms: deoxyribon...... ( RFLP ) Sequence polymorphism which results in changes in the restriction map . Other Resources ... Full article >>> Restriction Fragment Length Polymorphisms ( RFLP s) Restriction enzymes cut DNA at precise points producing ... Full article >>> Restriction fragmen......ngth) occurs in the DNA sequence . When there are changes between sequence s, a recognition site may appear or be lost. Full article >>> Digestion s of double- strand ed DNA by many restriction enzymes (e.g. EcoR I) generate ends with a short single- strand ed sequence s. Such ends a......ngth) occurs in the DNA sequence . When there are changes between sequence s, a recognition site may appear or be lost. Full article >>> Restriction The cleavage of double- strand ed DNA by an endonuclease ( restriction enzyme ). The restriction enzyme distinguishes between self......; These variation s result from rare sequence changes that create or destroy restriction site s in the genome . Retinol-binding protein 21 kDa protein retro- backwards, behind retrovirus An RNA virus containing reverse transcriptase . Full article >>> A map showing physical loc......unctuation makes reading the m RNA susceptible to changes in the frame of reading the nucleotide residue s. The m RNA must also contain signals for initiation and termination of a polypeptide chain. Full article >>> The first function is to attach it to the cell surface, it does that ......ommon method for testing the effects of sequence changes on promoter function. Largely supplanted by the reporter gene luciferase. Full article >>>......fferences between chimps and human s also involve changes in regulatory sequence s — promoter s and enhancer s — of their structural gene s. Full article >>> Enhancer A cis- actin g regulatory sequence that can increase transcription from an adjacent promoter . Full ar...... the promoter of a gene or make subtle codon changes in the open reading frame to identify important amino residue s for protein function. Full article >>> Effects of point mutation s: Point mutation s in junk DNA are common but have no effect. Sometimes point mutation s in re......r s are parts of the nervous system that sense changes in the internal or external environment s. Full article >>> receptor -mediated endocytosis The type of endocytosis that involves a specific receptor on the plasma membrane that recognizes an extracellular molecule and binds......ia, is a theory of evolution which states that changes such as speciation can occur relatively quickly, with long periods of little change—equilibria—in between. Full article >>> punctuated equilibrium -- A model of evolution in which change occurs in relatively rapid b...... Prophase Prophase is a beautiful menagerie of changes that occur in both the cytoplasm and nucleus of a dividing cell . Meiosis Introduction to mitosis and the process of cell division . Full article >>> Prophase Main article: Prophase The genetic material ( DNA ), which n......h a population of organ isms accumulats genetic changes that enable its members to successfully adapt to environment al conditions and to better exploit food resources. Exon . Full article >>> [A plasma logen] plasmid An extrachromosomal, independently replicating, small circular DNA ...... These hormones induce and maintain the physical changes of puberty and the secondary sex character istics. Full article >>> The typical ligands for nuclear receptor s are lipophilic hormones , with steroid hormones (for example, testosterone, progesterone and cortisol) and derivative......enetics is the study of the genotype s and their changes in entire population s. Link to a discussion. The Measure of " Fitness " ... Full article >>> Population genetics The study of variation in genes among a group of individuals. Positional cloning A technique used to identify gene......on s of living things evolve Evolution refers to changes in the genetic composition of a population . Genetic changes may result in changes in the physical or behavioral character istics of the individuals. Full arti......xidases) by fusion with the plasma membrane ; the changes caused by the cortical re action help to prevent polyspermy. Full article >>>......> Sequence polymorphism which results in changes in the restriction map . Other Resources PubMed Google ... Full article >>> Restriction fragment length polymorphism (Redirected from RFLP ) In molecular biology , ... Full article >>> Dr. Francis Collins, directo......made after transcription has been completed. The changes to m RNA include addition of a 5'cap and 3' polyA tail and removal of introns , and to t RNA include modification of bases and removal of introns . Full article >>> messenger RNA (m RNA ) A class of RNA molecule s, eac...point mutation a mutation that changes a single DNA base pair Source: Jenkins, John B. 1990. Human Genetics , 2nd Edition. New York: Harper & Row ... Full article >>> Point mutation s that occur in non- coding sequence s are most often without consequences, alth......ll ; its surface has molecular regions that detect changes in external conditions and act as a selective barrier to the passage of ions and molecule s between the cell and its environment . Full article >>> plasma membrane The outer boundary of cells which is only visible with an elect......A are trans formed if their exhibit morphology changes such as rounded cell bodies, loss of contact inhibition, and formation of plaque s. Full article >>> Plaque . A clear spot on a lawn of bacteria or culture d cells where cells have been Iysed by viral infection. Plasmid (p...[Gk. phylon , race, tribe] The changes taking place in a single lineage of organ isms over a long period of time; one of the principal patterns of evolution ary change. phylogeny ... Full article >>> Related Terms: Phylon A group of animals or plant s construct...Photon s are produced by changes in quantum state of a charged particle, from a state of higher energy to a state of lower energy. Full article >>> Photon s have spin 1 and they are therefore bosons. Photon s mediate the electromagnetic field (that is, they are the ......vity (or "trace") tends to induce lasting cellular changes that add to its stability.... Full article >>> Anthropologists refer to the hoax as 'another instance of desire for fame leading a scholar into dishonesty' and boast that the unmasking of the deception is 'a tribute to the persistence......ion in a single Paramecium cell similar to the changes that occur during conjugation . 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 ... Full article >>> nuclear reorganization and self- fertilization within the same individual, as in Paramecium Source: Noland, George B. 1983. Ge...... progression of cytological, genetic, and cellular changes that culminate in a malignant tumor . Open pollination . Pollination by wind, insects, or other natural mechanisms. Full article >>> Oncogene : A gene in a tumor virus or in cancer ous cells which, when trans ferred into......f a protein are called silent sites. Sites where changes result in an amino acid substitution are called replacement sites. Full article >>> Nucleotide : A building block of DNA or RNA consisting of a nitrogenous base ( adenine , guanine , thymine , or cytosine in DNA ; aden...nonsense mutation a mutation that changes a codon from one that specifies an amino acid ...s With a nonsense mutation , the new nucleotide changes a codon that specified an amino acid to one of the STOP codon s (TAA, TAG, or TGA). Full artic......l article >>> neurula tion External changes along the upper surface of a chordate embryo that result in the formation of the neural tube . neuston Organ isms that live on the surface of the sea. neutral selection See genetic drift . Full article >>> neurula - vertebra...
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(Date:12/3/2008)... 14-17, 2008 at the University,s Sede Boqer campus...s Jacob Blaustein Institutes for Desert Research (...e the United Nations Educational, Scientific and C...or Foreign Affairs, Jewish National Fund, the U.S....er in smart water solutions for agriculture. , ...
(Date:12/2/2008)...some substantial benefits for some women, accordin...nt Anthropology . , The hormones that make wome... able to deal with stress also tend to redistribut...zabeth Cashdan, an anthropologist at the Universit...men are under pressure to procure resources, they ...
(Date:12/2/2008)...rm recovery of rivers from the effects of acid rai...ding to a new study by Cardiff University. , The...lle Durance of the School of Biosciences took plac...-Wales. Their findings are published online today ...plied Ecology . , Carried out in 14 streams, th...
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