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Rapidly in the development of new,beneficial traits, followed by very long periods of little change
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What models of evolution view change as occurring over a long time frame and at a relatively constant pace?
The view of evolution occurring relatively constantly over a long time frame is called gradualism. This stands in contrast to the view of long periods of stasis punctuated by relatively rapid change, usually caused by environmental change. This is called punctuated equilibrium.A modern view of evolution recognizes that both processes are at work.
Is fissions form of energy renewable or nonrenewable?
yes it is arenewable it is occurring in sun yes it is arenewable it is occurring in sun
A prevents actions from occurring?
inhibitor
What naturally-occurring material is antiseptic?
alcohol
What naturally occurring inorganic crystalline solid is a?
a mineral
How do habitat and competition lead to speciation of Pollenpeepers on Warwick Archipelago?
how is natural selection occurring in the pollenpeepers
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 reversible reaction is occurring in both directions at the same rate?
equilibrium
What prevents speciation from occurring in sympatric populations?
Gene flow between populations can hinder the development of genetic differences necessary for speciation. Additionally, strong environmental pressures favoring specific traits in a population can limit genetic variation and prevent the emergence of distinct species. Lastly, hybridization between different groups can also counteract speciation in sympatric populations.
What models of evolution view change as occurring over a long time frame and at a relatively constant pace?
The view of evolution occurring relatively constantly over a long time frame is called gradualism. This stands in contrast to the view of long periods of stasis punctuated by relatively rapid change, usually caused by environmental change. This is called punctuated equilibrium.A modern view of evolution recognizes that both processes are at work.
When a chemical reaction and it and reverse are occurring at the same time and at the same rate the reaction has achieved?
equilibrium
When a reversible reaction is occurring in both directions at the same rate is called what?
When a reversible reaction is occurring in both directions at the same rate, it is called a dynamic equilibrium. In this state, the concentration of reactants and products remains constant over time, indicating that the forward and reverse reactions are happening at an equal rate.
Why is equiibrium referred to as dynamic?
Equilibrium is referred to as dynamic because in a system at equilibrium, the forward and reverse reactions are occurring at the same rate. This means that while it appears that there is no net change in the concentrations of reactants and products, molecules are constantly being converted back and forth between the two states.
Do population geneticists use the Hardy-Weinberg equilibrium equation to determine whether evolution is occurring at a given locus?
Yes, population geneticists use the Hardy-Weinberg equilibrium equation as a null hypothesis to assess whether evolution is occurring at a given locus. Deviations from expected genotype frequencies can indicate that evolutionary forces like selection, genetic drift, or gene flow are at play in a population.
What is thermodynamic equilibrium?
At thermodynamic equilibrium the dynamic processes for changes in a system have reached a steady state (not changing with time) where temperature has stabilized to a constant, no heat is being exchanged, no work is occurring, composition is constant (reactants are being converted to products at the same rate that the products are converting back to the reactants), pressure is constant, if there is more than one phase, movement between the phases is balanced (for example evaporation and condensation are occurring at the same rate), and there are no concentration gradients.
How do you decrease the rate of isomerization of a chemical reaction?
It depends on what type of isomerization is occurring; configurational or stereoisomerization. Use of equilibrium concentrations and/or catalysis concentration strategies would work.
What is true of a dynamic equilibrium?
When the concentration of the reactants is equal to the concentration of the products and does not change over time, the system has reached dynamic equilibrium. Dynamic equilibrium means that the reaction is still occurring and does not stop. The reaction never reaches completion, because the reverse reaction is moving at the same rate as the forward reaction. The products and reactants are balanced. The reactants are producing at the same speed that the products are changing back into the reactants. When a reaction is in dynamic equilibrium, it is hard to tell that a reaction is occurring. There is no net change in the concentration of the products or reactants because both forward and reverse reactions are moving at the same rate.
