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Rapidly in the development of new,beneficial traits, followed by very long periods of little change

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โˆ™ 2011-03-10 16:41:13
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How does natural selection lead to evolution

Competitive exclusion is most likely to occur between two

What ecological word describes climax community

What must be true for natural selection to happen

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Q: Punctuated equilibrium interprets speciation as occurring how?
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How do habitat and competition lead to speciation of Pollenpeepers on Warwick Archipelago?

how is natural selection occurring in the pollenpeepers

When a reversible reaction is occurring in both directions at the same rate?


What prevents speciation from occurring in sympatric populations?

a) Natural Selectionb) Geographical Isolationc) Gene Flowd) Genetic Drift

When a reversible reaction is occurring in both directions at the same rate is called what?


What is the major difference between adaptive radiation and punctuated equilibrium?

They aren't exactly comparable as punctuated equilibrium is concerned with the evolutionary course of a species while an adaptive radiation generally involves speciation and so is concerned with the evolutionary course of a genus or family. That aside, the major difference is the variation in the rate of evolution: whether evolution is constant or occurring in bursts.Punctuated equilibrium - A species has a constant phenotype for many generation (stabilizing selection; no evolution) followed by a rapid burst of evolution (directional selection) which is then followed by another long period of stability and so on. Using its name: the equilibrium (no evolution) is punctuated by short but strong bursts of evolution.Adaptive radiation - A starting species expands into a new environment and begins to adapt to the new conditions, changing relative to the population still in the old habitat. These populations then colonize further habitats, each becoming different from the others, and so on... The "species" continually expands into new habitats, evolves, and eventually speciates producing a radiation of differently adapted species from a single ancestor. For your question, this means that selection is continually acting to make the populations more different from one and other rather than only happening in bursts

When a chemical reaction and its reverse are occurring at the same time and at the same rate the reaction has achieved?


When a chemical reaction and it and reverse are occurring at the same time and at the same rate the reaction has achieved?


What are some things that can lead to speciation occurring?

Isolation often leads to speciation, because as each isolated population evolves new characteristics, the separate populations eventually get DNA that is too different for the two to breed and have fertile offspring (this is the point when speciation has occurred). In the case that there is not isolation, the whole species must slowly evolve until it becomes a new species. However, here the line between where the speciation actually occurred becomes blurry, because it doesn't happen in a single generation.

What is chemical eqilibrium?

The state of chemical reaction in which the forward and the reverce processes are occurring at the same rate.This state is called state of chemical equilibrium

When a chemical reaction and its reverse are occurring at the same time and at the same rate what is it called?

"When the concentration of the reactants and products of a chemical reaction are not changing, they are at equilibrium. This is in effect is the same thing as having a chemical reaction's forward and reverse rates occurring at rates so that the product's and reactant's concentrations don't change. " Close. The answer to the original question is Dynamic Equilibrium.

How do changes in concentration disturb the equilibrium of a reversible reaction?

Le Chatlier's PrincipleIf an equilibrium reaction is occurring and some reactant from either side of the equilibrium is added, the reaction goes in a direction that is to oppose the addition of a reactant. For example. In the equilibrium of CO2 + H2O = H2CO3, if more CO2 is added then the equilibrium shifts in such a way that this change is opposed so more H2CO3 is produced. For more information, research Le Chatlier's Principle.

Do population geneticists use the Hardy-Weinberg equilibrium equation to determine whether evolution is occurring at a given locus?

Yes. This answer is TRUE. (I am an Anthropology Grad student).

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