environment

Vitamin

... Niche the functional role of a species in its environment including its activities "job" relationships and location (nidus = nest) ... Full article >>> Why are vitamin s lacking in rice? First of all, you need to realize that rice when it's consumed is polished. The outer layers of rice ...

Viability

...r or not a species will persist in a particular environment . positional information ... Full article >>> The Commercial Viability of EXCAVATOR: A Software Tool for Gene Expression Data Clustering Robin Zimmer[1] (robzimmer@apocom.com), Morey Parang[1], Dong Xu[2], and Ying Xu[2] [1]ApoCom ...

Variation

...of its surroundings despite large variation s in environment al temperature. Full article >>> Polymorphism The occurrence of more than one form of, for example, a DNA sequence , type of protein or morphological trait in a group of organ isms, revealing underlying genetic variation in ...

Vagina

...2; These alkaline bases counteract the acidic environment of the vagina l canal (which is harmful to sperm ), and protect DNA inside the sperm from acidic denaturation . Full article >>> The os is each end of the cervix , internal (to the uterus ) and external (to the vagina ) A m...

Uterus

...te with the females that develop in an all-female environment . Full article >>> Endometrium the richly-vascularized lining of the uterus which brings food to a developing baby (endo = within inner; metr = uterus mother; -ium = small) ... Full article >>> Obesity is associate...

Uracil

...se found in RNA . urban Peculiar to the human environment , as contrasted with that found normally around wild animals . Full article >>> Uracil (U): A base ; one of the molecular c omponents of RNA . Bonds only with adenine (U-A). Virus : A noncellular biological entity that can repr...

Unicellular

...ull article >>> Unicellular often environment ally resistant dormant or reproductive body produced by plant s and some microorganisms and capable of development into a new individual either directly or after fusion with another spore . Conjugation ... Full article >>> unicell...

Tympanic membrane

...teractions between communities and their physical environment s. Full article >>> pass down the auditory canal of the outer ear strike the eardrum ( tympanic membrane ) causing it to vibrate these vibrations are trans mitted across the middle ear by three tiny, linked bones, the ossicles: ...

Turnover

...he key modes by which the cell can modulate its environment , involving not only turnover of the extracellular matrix but also the regulation of cell membrane proteins , ... Full article >>> The quantity kcat, also called the turnover number, incorporates the rate constants for all steps...

Tropism

...s toward or away from a stimulus in the plant 's environment . Plant movement in response to an environment al stimulus. PICTURE ... Full article >>> tropism A growth response that results in...

Transgenic plant

...ing of transgenic plant s to grow under specific environment al conditions or in the presence (or absence) of c... outside of the crop field. The ecological and environment al effects of transgenic plant s are ... Full article >>>...

Transformation

... transformation . Condition in which DNA in the environment of bacteria somehow penetrates them and is incorporated into their genetic complement , so that their progeny inherit the genetic character s so acquired. Full article >>> transformation - morphological changes in a lymph ocy...

Trait

...affected by more than one gene , and also by the environment . Full article >>> Trait s Are Her...tinuous change of character in response to some environment al gradient. Full article >>> Mendel 's second law claimed that trait s segregate i...

Tetrapod

...rm ic (deriving their body temperature from their environment ) rather than endotherm ic (deriving their body heat from an independent, ... Full article >>>...

Sympatric

... evolve similar character istics due to similar environment al pressures (con = with together; verg = to turn bend) ... Full article >>> Sympatric speciation : the formation of new species without geographic isolation; the acquisition of reproductively isolating mechanism among individual...

Symbiosis

...irst plant s were moss -like and required moist environment s to survive. Full article >>> those existing between different species , are numerous, and usually described according to their beneficial, detrimental or neutral effect (for example, symbiosis (relation ++) or competition (relatio...

Survival of the fittest

...all organ isms are equally well adapted to their environment , some will survive and reproduce better than others -- this is known as natural selection . Sometimes this is also referred to as " survival of the fittest ". Full article >>>...

Suppression

...opulation s by naturally occurring biological and environment al agents. Natural enemies: Living organ isms found in nature that kill, weaken, or reduce the reproductive potential of other organ isms. Full article >>> *Parallel Triplex Formation as Possible Approach for Suppression of DNA Vi...

Survival

...he evolution of organ isms best adapted to the environment . One measure of fitness . Environment ... Ful...ism in survival and reproduction in a certain environment is said to be adaptive. What sorts of adaptive trait s do you have? How do they aid your survival...

Superficial

...ecology A critical term applied to superficial environment alists who claim to be green but are quick to compromise and who do little to bring about fundamental change. Full article >>> A phenomenon in which one species benefits by a superficial resemblance to an unrelated species . A pre...

Striated muscle

...is well established that in the appropriate ionic environment , and using energy derived from ATP , thick (' myosin ') and thin (' actin ') filaments can associate to generate contractile force. Full article >>> Striated muscle generally responsible for the voluntary movements of the body. sli...

Striate

...is well established that in the appropriate ionic environment , and using energy derived from ATP , thick (' myosin ') and thin (' actin ') filaments can associate to generate contractile force. Full article >>> Striate d muscle generally responsible for the voluntary movements of the body. s...

Strain

... population that is adapted to the unique local environment al conditions (eco oikus = house) ... Full artic...lso experience physiological stress under adverse environment al conditions. stress-related disease See stress shock. Full article >>> In primitive...

Stomata

...es and stems that allows gas exchange between the environment and the interior of the plant . Full article &#... has the ability to open and close in response to environment al conditions. Full article >>> small opening such as found in leaves; plural, stoma...

Stoma

...es and stems that allows gas exchange between the environment and the interior of the plant . Full article &#... has the ability to open and close in response to environment al conditions. Full article >>> stoma ch The expansion of the alimentary canal b...

Stele

...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 into the xylem ...

Spore

...62;> Spore s/Pollen spore s for resisting environment al degradation Spore s that germinate into the g...cle >>> Spore Unicellular often environment ally resistant dormant or reproductive body produced by plant s and some microorganisms and capable...

Species

...es of grass grows best in a particular grassland environment (determined by temperature, rainfall, and soil conditions). Full article >>> The evolution ary history of a species —which tells the character istics of the various species from which it descended—together with its ge...

Sorus

... communication that are trans mitted through the environment with little loss of strength ( attenuation ). Full article >>> sorus (pl. sori) A group of sporangia developed on the underside of sporophylls ( spore -bearing leaflets ) of the sporophyte generation of a fern. Covered in Lab 7 T...

Somatic hypermutation

...ertebrate immune system shows that the variable environment of antigens has provided selective pressure for the use of adaptable codon s and low-fidelity polymerase s during somatic hypermutation . Full article >>>...

Somatic

...s system that carries impulses from the external environment and the sense s. sepals : modified leaves that enclose and protect a growing bud in flower s. Full article >>> archeocyte - somatic cell of sponge that can differentiate into all three other cell types of the organ ism. aste...

Sensory neurons

... neuron s that receive stimuli from the external environment . sensory somatic system: a sub division of the...s system that carries impulses from the external environment and the sense s. Full article >>> sensory neurons Neuron s that carry signals fr...

Seminiferous tubules

... neuron s that receive stimuli from the external environment . Full article >>> seminiferous tubules Tubules on the interior of the testes where sperm are produced. PICTURE sensor In a closed system, the element that detects change and signals the effector to initiate a response. Full art...

Seminal vesicles

...perhaps in other ways provide an optimum chemical environment for the sperm . Full article >>> semen The thick, whitish secretion of the reproductive organ s in the male; composed of sperm and secretions from the prostate, seminal vesicles , and various other glands and ducts. Full artic...

Sense

... sense , ecology is can also mean: the natural environment , or an ana lysis or study using the principles ...s system that carries impulses from the external environment and the sense s. sepals : modified leaves that enclose and protect a growing bud in flower s. F...

Semilunar valves

... neuron s that receive stimuli from the external environment . Full article >>> Again, once all the blood has left, the pulmonary and aortic semilunar valves close. Finally complete cardiac diastole involves the relaxation of the atria and ventricle s in preparation for new blood to enter the...

Selection

...duce individuals that are better adapted to their environment . It is important to keep in mind as you read belo... in a population that are better adapted to the environment al conditions increase in frequency relative to less well-adapted forms over a number of generations...

Seed plant

...porophyte Spore s/Pollen spore s for resisting environment al degradation ... Full article >>> seed plant Common term for gymnosperms and angiosperm s. seed - scale complex The spirally arranged scale s on a female strobilus in gymnosperms . Full article >>> seed plant...

Seed

...e degree of dis order or randomness of a system. environment al fitness : an individual's ability to adapt to an environment and reproduce. Full article >>> sperm atos - seed , semen ; Gr. kytos - a hollow ...

Screening

..... Full article >>> Screening of environment al isolates resulted in the discovery of flavo proteins capable of denitrating the explosives pentaerythritol tetranitrate (PETN) and glycerol trinitrate. Full article >>> The channel also has a reputation for screening challenging ...

Scientific method

... a scientific basis for express ing the goals of environment alism and have given scientific method ology, measure, and terminology to environment al issues. Full article >>> Do you think it's possible to predict which species are...

Run-off

...e >>> A process in which an aquatic environment accumulates high nutrient levels due to factors such as industrial or urban pollution or run-off of fertilizers from nearby agricultural lands. Full article >>>...

Responsiveness

...ving things to respond to stimuli in the external environment . resting potential : the inactive state of a neuron in which the cytoplasm is negatively charged with respect to the outside of the cell . Full article >>> Upon receipt, applications will be reviewed for completeness by DRG and ...

Respiration

...on dioxide between an organ ism and the external environment . Full article >>> In respiration ...embrane structure and describe interactions with environment . Full article >>> tracheae -- Internal tubes through which air is taken for respi...

Reproduction

... Environment al resistance: those factors of the environment which prevent reproduction or inhibit developme...udy of an organ ism's interrelationship with its environment . Economic threshold: see Action threshold. Full article >>> Definition: Haploid ...

Repression

...lucose is the pre dominant carbon source in the environment of the cell . 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 >>> Repression Switching off the expression of a gene or a group of genes in response to a chemical or other stimulus. Full article >>...

Renal veins

...ving things to respond to stimuli in the external environment . Full article >>> renal vein: The filtered blood returns to circulation through the renal veins which join into the inferior vena cava . renal pelvis: Basically just a funnel, the renal pelvis accepts the urine and channel...

Renal arteries

...ving things to respond to stimuli in the external environment . Full article >>> The renal arteries branch quickly into very small capillaries that make up the glomerulus of the nephron . The blood pressure within the capillaries squeezes liquid into the Bowman's capsule . This process ...

Renal

...ving things to respond to stimuli in the external environment . Full article >>> Renal corpuscles - the initial filtering component of nephron s in the kidney s splenic lymph oid nodule s, or White nodule s - follicles in the white pulp of the spleen , containing many lymphocytes ......

Reflex arc

...y; involved in the detection of a stimulus in the environment by sensory nerve endings, followed by impulses that travel via the sensory neurons to the spinal cord . Full article >>> reflex arc Pathway of neuron s, effector(s) and sensory receptor s that participate in a reflex. region of...

Red blood cells

...ssist in communication with other cells and the environment . Red blood cells , for instance, ... Full article >>> blood islands - also known as angiogenetic clusters; masses of splanchnic mesoderm al cells found in the yolk sac of amniotes. The first blood forming tissue of the embryo...

Recombinant DNA molecule

...t DNA molecule s in microorganisms in the natural environment . Full article >>> Recombinant clones : Clones containing recombinant DNA molecule s. See recombinant DNA technologies. Recombinant DNA : The combination of foreign DNA insert s with vector DNA (e.g., plasmid , phage , ...

Recombinant DNA

...ther DNA segment s in a cell -free system (an environment outside a cell or organ ism). Full article &#...her DNA segment s in a cell - free system (an environment outside a cell or organ ism). Full article >>> PACKAGE - In recombinant DNA p...

Recombinant

...ther DNA segment s in a cell -free system (an environment outside a cell or organ ism). Full article &#...her DNA segment s in a cell - free system (an environment outside a cell or organ ism). Full article >>> PACKAGE - In recombinant DNA ...

Recessive gene

...ne expression . It depends both on genotype and environment . Full article >>> Likewise, there are some genetic algorithm implementations that do have diploid chromosomes and dominant and recessive gene s (Goldberg 1989, p.150; Mitchell 1996, p.22). Full article >>>...

Receptor

...n physiology , any structure which, on receiving environment al stimuli, produces an informative nerve impulse...y receptor is any structure which, on receiving environment al stimuli, produces an informative nerve impulse . Full article >>> T- cell recep...

RecA protein

...icle >>> in radioactive mixed waste environment s and engineering of heavy metal resistance in this organ ism will be described. Finally, current attempts to acquire large amounts and crystallize Deinococcus' extraordinary and highly toxic RecA protein will be ... Full article >>>...

Radius

... species spreading into and making use of a new environment (ad = to toward; apt = fasten adjust fix; radia = spoke ray radius ) ... Full article >>>...

Quantitative trait loci

...affected by more than one gene , and also by the environment . Full article >>> A genetic map of the dog genome will make breed -specific trait s amenable to quantitative trait loci (QTL) ana lysis . Presently, a genetic map of dog consisting of microsatellite marker s is being asse...

Quantitative trait

...affected by more than one gene , and also by the environment . Full article >>> the tendency of the quantitative trait s of offspring to be closer to the population mean than are their parents' trait s Source: Jenkins, John B. 1990. Human Genetics , 2nd Edition. New York: Harper & R...