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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.
What else can I help you with?
Under what circumstances would evolution not occur if?
Evolution would not occur if there is no genetic variation within a population, no selection pressure, or if there is no reproduction and passing on of genes to the next generation.
For a mutation to affect evolution it must occur in?
For a mutation to affect evolution, it must occur in the DNA of reproductive cells (sperm or egg cells) so that it can be passed on to offspring. Mutations that occur in somatic cells (non-reproductive cells) do not directly impact evolution as they are not inherited by future generations.
Evolution can occur at different rates however for evolution to occur there must be?
variation in the traits of organisms, heredity (the ability to pass on those traits to offspring), and differential survival and reproduction based on those traits (natural selection). These elements work together to drive the process of evolution over time.
Does Evolution results from random events?
Evolution is a theory that all species are constantly evolving. It states that evolving can be faster in certain circumstances. Random events, especially geographical, are one of these cicumstances.
Which of the following is necessary for evolution to occur?
Genetic variation is necessary for evolution to occur, as it provides the raw material for natural selection to act upon. This variation can arise from mutations, genetic recombination, or gene flow.
Under what circumstances would evolution not occur if?
Evolution would not occur if there is no genetic variation within a population, no selection pressure, or if there is no reproduction and passing on of genes to the next generation.
Under which circumstances might the reduction of blood flow to the kidneys occur?
During masturbation.
Under what circumstances do mergers and acquisitions occur?
A period of intense technological changes encourages mergers and acquisitions.
Is evolution still taking place?
Yes. Evolution is a continuous process. It happens to all populations of living things, even to human populations. However, it may occur at varying rates, depending on the size of the population and other circumstances, so it may not be immediately apparent that evolution is, in fact, happening.
Which is the single most important type of mutation that eventually allows for evolution via natural selection to occur?
gene duplication (might give advantages)
Does evolution occur in individuals or in population?
Evolution occurs in population not in an individual.
Did evolution occur in the permian period?
Yes. Evolution ocurred in all geologic periods.
Why did evolution not occur in down syndrome?
Down Syndrome is a the addition of an extra chromosome and not really related to evolution. It is more of a genetic mutation that causes this event to occur.
How is variation related to evolution?
The more variation there is in a group of specimens, the more evolution can occur between them.
What are some draw backs of selective breeding?
You do not allow evolution to occur, for you are evolution in selective breeding.
How do variations occur?
During evolution, chromosomal cariation in structure cannot occur due to
For a mutation to affect evolution it must occur in?
For a mutation to affect evolution, it must occur in the DNA of reproductive cells (sperm or egg cells) so that it can be passed on to offspring. Mutations that occur in somatic cells (non-reproductive cells) do not directly impact evolution as they are not inherited by future generations.
