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What is the model in of evolution in which periods of rapid change occur is called?
Selective breeding is used for more rapid evolution or artificial breeding.
Scientists have observed evolution on a rapid time scale in what organism?
Bacteria
Under what circumstances might rapid evolution occur?
Rapid environmental change results in rapid evolutionary change (as long as it doesn't occur too fast, in which case the organsisms will simply die out). Also the disappearance of the dominant organisms (eg dinosaurs) leaves an empty space in the ecosystem and the remaining organisms will evolve quickly to fill it. Finally, the release of an animal into a new environment or a domesticated animal into a natural environment results in rapid evolution. Two examples are cane toads in Northern Australia which have evolved longer legs so they can travel further and feral cats in Australia reverting back to their natural state (insanely big and evil-looking) in just 4 generations.
The theory that evolution occurs during short periods of rapid change is puntuated?
Punctuated equilibrium.
What rapid evolution can come about by the mutation of just a few genes?
Nowadays, it's called a "birth defect".
What is the model in of evolution in which periods of rapid change occur is called?
Selective breeding is used for more rapid evolution or artificial breeding.
What are some reasons rapid evolution may occur after long periods of equilibrium?
Here are a couple of possiblilties (there are more): * The population can develop isolated subpopulations on its periphery. Evolution is much more rapid in small isolated populations. * Changes in the environment can lead to rapid evolution. Variation that was once neutral may now become beneficial and increase in frequency, while variation that may have been adaptive in the previous environment may now be deleterious and selected against.
What did the framers of the modern synthesis not use in formulating this synthesis a. populations as unit of evolution b. rapid change was prevalent c. natural selection was not imp?
b. rapid change was prevalent.
What theory has been used to explain the pattern of rapid evolution that often occurs after a mass extinction event?
The theory of rapid evolution rather than over a very long time.
What is the definition for rapid evolution?
Rapid evolution is where the subjective species in a population is considered to be evolving in an unusually high frequency and rate, thus 'rapid' evolution is occuring.
What is the rapid growth of city populations called?
This defines a rapid population increase.
Is it possible for evolution to occur by both natural selection and punctuated equilibrium?
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.
When do tonic seizures most often occur?
Tonic seizures commonly occur during non-rapid eye movement (non-REM) sleep and drowsiness.
Model of evolution showing rapid change?
Fossil
What is evolution that occurs in short rapid bursts?
Punctuated equilibrium
Which organism was reported to have experienced rapid evolution in a lake in Germany?
Hydra
Scientists have observed evolution in a rapid time scale in what organism?
Bacteria
