define punctuated equilibrium
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Punctuated equilibrium Punctuated equilibrium. Definition. noun. A theory that describes an evolutionary change happening rapidly and in brief geological events in between the long periods of stasis (or equilibrium). The theory is based on the stasis in fossil records, and when phenotypic evolution occurs, it is localized in rare, rapid events of branching speciation.
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- Definition of EQUILIBRIUM CONSTANT. : a number that expresses the relationship between the amounts of products and reactants present at equilibrium in a reversible chemical reaction at a given temperature.ADVERTISEMENT.Britannica.com: Encyclopedia article about equilibrium constant.efinition of EQUILIBRIUM CONSTANT. : a number that expresses the relationship between the amounts of products and reactants present at equilibrium in a reversible chemical reaction at a given temperature. ADVERTISEMENT. Britannica.com: Encyclopedia article about equilibrium constant.
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punctuated equilibrium punctuated equilibrium definition. The theory that new species evolve suddenly over brief periods of time, followed by longer periods during which there is no genetic change. Punctuated equilibrium is a revision of Darwin's theory of evolution. (Compare gradualism and catastrophism.)
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Economic inequality DEFINITION of 'Equilibrium'. The state in which market supply and demand balance each other and, as a result, prices become stable. Generally, when there is too much supply for goods or services, the price goes down, which results in higher demand. The balancing effect of supply and demand results in a state of equilibrium.
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Balance of nature The balance of nature is a theory that proposes that ecological systems are usually in a stable equilibrium or homeostasis, which is to say that a small change in some particular parameter (the size of a particular population, for example) will be corrected by some negative feedback that will bring the parameter back to its original point of ...
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Stephen Jay Gould Development of the theory of punctuated equilibrium was initiated by Niles Eldredge in a study titled ‘The allopatric model and phylogeny in Paleozoic invertebrates,’ which appeared in Evolution in 1971.
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Punctuated equilibrium Punctuated equilibrium, bottom, consists of morphological stability and rare bursts of evolutionary change via rapid cladogenesis, and is contrasted to the much more gradual, continuous phylectic gradualism, top. Diagrammatic representation of the divergence of modern taxonomic groups from their common ancestor.
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Pigovian Taxation as a Means of Reducing Carbon Emissions Pigovian Taxation as a Means of Reducing Carbon Emissions. Economic equilibrium is reached when demand and supply are equal. Market equilibrium is similar, with prices of goods and services canceling each other out. Loyal to the definition of “equilibrium,” this state will not change unless one of the contributing factors, such as supply or demand, changes first. Economic equilibrium is largely theoretical, but it’s an ideal which economic policymakers strive towards. Some market inequalities are countered with taxes or subsidies.
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- Gradualism and punctuated equilibrium are two ways in which the evolution of a species can occur. A species can evolve by only one of these, or by both. [ Scientists think that species with a shorter evolution evolved mostly by punctuated equilibrium, and those with a longer evolution evolved mostly by gradualism.
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- PUNCTUATED EQUILIBRIUM. Reviewed by Philip D. Gingerich. Stephen Jay Gould Harvard University Press 2007 ISBN 0-674-02444-3 $18.95. Punctuated Equilibrium is a theory about how the evolutionary process
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- Punctuated equilibrium is a theory used to justify coding, but time and variation won’t go away. It is a point in Darwin’s favor that the Origin of Species and natural selection both featured time and variation.
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Genetic equilibrium Genetic equilibrium describes a theoretical state that is the basis for determining whether and in what ways populations may deviate from it. Hardy-Weinberg equilibrium is one theoretical framework for studying genetic equilibrium.
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26 Incredible Dairy-Free Cheesecake Recipes. No Oven Necessary! If the thought of turning on the oven during the hot summer days turns you off, that’s ok. Not all desserts, including cheesecake, have to be baked. Make sure you have these 5 Essential Ingredients for Decadent and Summery No-Bake, Raw Vegan Treats.
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economics. fundamental finance .com Nash Equilibrium and Dominant Strategies. Nash Equilibrium is a term used in game theory to describe an equilibrium where each player's strategy is optimal given the strategies of all other players. A Nash Equilibrium exists when there is no unilateral profitable deviation from any of the players involved.
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constant Noun. 1. equilibrium constant - (chemistry) the ratio of concentrations when equilibrium is reached in a reversible reaction (when the rate of the forward reaction equals the rate of the reverse reaction).
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- Commercial Mortgages. Commercial mortgages are used for the purchase or refinance of commercial real estate. Commercial mortgage terms range from five to 25 years. The rate is rarely fixed for more than five years. Either the rate resets every five years or the loan balloons.When the rate resets, the loan is fully amortized over the term.here are a number of loan variations too, ranging from mortgages to term loans to lines of credit. Unlike residential loans, commercial loans do not always have set terms. While the specifics can be negotiated, average commercial loan terms fall into certain ranges.
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Market equilibrium Higher prices tend to reduce demand while encouraging supply, and lower prices increase demand while discouraging supply. Economic theory suggests that, in a free market there will be a single price which brings demand and supply into balance, called equilibrium price. Both parties require the scarce resource that the other has and hence there is a considerable incentive to engage in an exchange.
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equilibrium equilibrium-a chemical reaction and its reverse proceed at equal rates. chemical equilibrium. acid-base balance, acid-base equilibrium - (physiology) the normal equilibrium between acids and alkalis in the body; with a normal acid-base balance in the body the blood is slightly alkaline.
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Punctuated equilibrium Punctuated equilibrium (also called punctuated equilibria) is a theory in evolutionary biology which proposes that once species appear in the fossil record the population will become stable, showing little evolutionary change for most of its geological history. This state of little or no morphological change is called stasis.
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equilibrium Define equilibrium: a state of intellectual or emotional balance : poise — equilibrium in a sentence a state of intellectual or emotional balance : poise; a state of adjustment between opposing or divergent influences or elements…
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homeostasis the tendency of biological systems to maintain relatively constant conditions in the internal environment while continuously interacting with and adjusting to changes originating within or outside the system. See also balance and equilibrium. adj., adj homeostat´ic.
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- Punctuated equilibrium. Punctuated equilibrium (also called punctuated equilibria) is a theory in evolutionary biology which proposes that once species appear in the fossil record they will become stable, showing little evolutionary change for most of their geological history. This state is called stasis.
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homeostasis Definition of HOMEOSTASIS. : a relatively stable state of equilibrium or a tendency toward such a state between the different but interdependent elements or groups of elements of an organism, population, or group. — ho·meo·stat·ic \-ˈsta-tik\ adjective. See homeostasis defined for kids.
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- City of Joshua Tree, CA Zip Codes. City of Joshua Tree, CA Demographic Information. * Demographic data is based on information taken from the 2000 Census. City of Joshua Tree, CA covers 1 Area Code. City of Joshua Tree, CA covers 1 Zip Code. 1 City within 15 Miles of the City of Joshua Tree, CA.
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Competitive equilibrium Competitive equilibrium. Competitive equilibrium (also called: Walrasian equilibrium) is the traditional concept of economic equilibrium, appropriate for the analysis of commodity markets with flexible prices and many traders, and serving as the benchmark of efficiency in economic analysis.
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homeostasis homeostasis. the tendency of biological systems to maintain relatively constant conditions in the internal environment while continuously interacting with and adjusting to changes originating within or outside the system.See also balance and equilibrium. adj., adj homeostat´ic.omeostasis. a tendency of biological systems to maintain stability while continually adjusting to conditions that are optimal for survival. Homeostatic mechanisms are necessary for the body to regain its balance when disease or injury occurs and to maintain that balance if it is to remain healthy.