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Is it possible for evolution to occur by both natural selection and punctuated equilibrium?
Wiki User
∙ 7y ago
Yes. Evolution via punctuated equilibrium still depends on natural selection. In punctuated equilibrium there are long periods in which most species are well-suited to their environments, and so there is is little selective pressure to change. These periods are punctuated by times of more rapid environmental change and greater stress, which results in greater selective pressure for populations to change.
Wiki User
∙ 7y ago
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Does evidence support both punctuated equilibrium and gradualism?
Evidence supports a model in which periods of relative stability are punctuated by short periods of rapid (relatively speaking) change. It could, theoretically, be possible for evolution to proceed in a gradual manner. However, mathematical modelling and fossil evidence show that punctuated equilibrium is the norm.
What are the 2 things necessary for evolution to occur?
Answer 1Two broad processes that make evolution possible are 1 : directional forces including mutation , migration and selection and 2: nondirectional forces that include random genetic drift , bottleneck effect , founders effect ,and chance variations .Answer 2Evolution is most commonly described as a combination of reproductive variation and differential reproductive success.Reproductive variation in itself is a "non-directional" phenomenon, that produces mostly random variations. Differential reproductive success (or: natural selection) is a "directional" phenomenon, that basically acts as a mechanism limiting the set of "directions" produced by random variation.
How does natural selection support the theory of evolution?
Simple observation. Look at the many species that have evolved to specialize to a specific environment. Let's say you have daisies growing in your yard. They will have some natural differences in them. Some may be taller than others. You mow your yard on a regular basis. Many of the taller ones can't survive long enough to go to seed. More of the naturally short ones survive to "mate" with other short ones and soon enough their genes come to dominate in that environment. Eventually you wind up with a species of short-stemmed daisies. However, that fact that this is an observable truth does not prove the idea that one species evolved from another (the theory of evolution). While it suggests that this is possible, there is a woeful lack of evidence to prove it. Even Darwin knew this and wrote about it. Those short daisies are still daisies.
What are five conditions that can disrupt genetic equilibrium and cause evolution to occur?
Three ways genetic equilibrium can be disrupted include, mating not being random, mutations occur, and natural selection occurs. Two other disruptions are organisms move in and out of the populations and many populations are too small to begin with.
How did Gregor Mendel's experiments prove Charles Darwin's theory of evolution wrong?
That traits can be inherited directly from a parent -- blending of traits does not always happen. For example, if one fertilized a green pea with a yellow pea, it was completely possible to get a fully green pea, instead of a greenish-yellow one.
Does evidence support both punctuated equilibrium and gradualism?
Evidence supports a model in which periods of relative stability are punctuated by short periods of rapid (relatively speaking) change. It could, theoretically, be possible for evolution to proceed in a gradual manner. However, mathematical modelling and fossil evidence show that punctuated equilibrium is the norm.
What are 3 possible causes for punctuated equilibrium?
1) Pattern in forcings2) Rapid evolutionNo competition for resourcesNo predation3) Appearance of adaptive breakthroughs
Describe how natural selection is related to organic evolution?
Organic evolution is the process by which the genetic makeup of a species changes over time. There are several mechanisms by which this can happen: natural selection, genetic drift (chance), migration and mutation. So natural selection is one possible way in which evolution can take place. Most biologists agree that natural selection is the most important mechanism of evolution. This mechanism was first discovered by Charles Darwin and, independently. by Alfred Wallace.
How did Charles Darwin use the concept of density-dependent factors in his theory of evolution?
Charles Darwin used his concept of density dependent factors in his theory of evolution by formulating a scientific argument by use of natural selection. His demonstrations showed how natural selection is the only possible link between adaptation and evolution.
Describe the theory of evolution by natural selection as put forward by both Darwin and Wallace Where possible include observations made of Australian flora and fauna and explain how these obse?
What are the differences between creation and the theory of evolution
Is diffusive equilibrium possible for the molecule that is impermeable?
no.
Did Huxley writes that the theory of evolution was by no means the sole product of Darwin?
Possible so, as the theory of evolution by natural selection, though his greatest product, was by no means Darwin's only production. Just before he died he produced a treatise on earthworms that is still relevant today.
What species can evolve from natural selection?
Microevolution is merely evolution, the change in allele frequency over time in a population of organisms, and all animals do this all the time.Natural selection is always summing up the variation among a population of organisms and selecting those that show survivability and reproductive advantages, even is the selection does no more that stabilize the organisms phenotypes.Look to the evolutionary history of horses or whales to see clear examples of evolution and selection through time.
Is it possible to maintain equilibrium in a natural environment?
yess
What does natural selection mean in science terms?
It is meant to indicate the Darwinian model for evolution, as opposed to for instance the Lamarckian model. It would be true that evolution occurs and has occurred even without Darwin; but until Darwin, various explanations would have been possible for why and how it happens. Darwin first formulated the thesis that evolution is directed by differential reproductive success.
The use of an antibiotic resistance gene on a plasmid used in genetic engineering makes?
direct selection possible
How can natural selection and evolution be a problem to humanity?
In many ways. For one thing, evolution and natural selection are mindless processes; they act without regard for the rights to happiness or life of the individual. On the other hand, human civilization has throughout history tried as much as possible to move away from blind forces of nature like natural selection, and as a result, human populations now may harbour many genes that would, under less civilized circumstances, have detrimental effects on human survival chances.
