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What are three reasons for natural selection to occur?
1. different breeding 2. evolution 3.adaptation
6 Explain why evolution by natural selection can not occur if the variation in a characteristic does not contribute to differences in fitness?
If there is not reproductive fitness conveyed by a variant trait, then natural selection has nothing to select and nothing to promote into the populational gene pool.
What is the third step in natural selection?
There are really no steps in natural selection - just conditions required for it to occur.
Why would natural selection not occur in this poplutation?
What population? Perhaps you mean if there were no variation for natural selection to select from.
How is genetic diversity important to the concept of natural selection?
Without genetic diversity, natural selection cannot occur
What are the 4 mechanisms by which evolution can occur?
genetic drift, mutation, natural selection, and migration
Why does evolution evolution by natural selection can not occur if the variation in a characteristic does not contribute to differences in fitness?
Differential selection is just that, differential. Some variation is marginally superior to another variation us fitness difference, so the key is to have variation. Then natural selection will " see " this slight variation and select the better adapted trait against the background of the immediate environment.
What are three reasons for natural selection to occur?
1. different breeding 2. evolution 3.adaptation
How does natural selection provide a mechanism for evolution to occur?
by having sexual intercourse with hoes and getting money
Why is Lamark not called the father of Evolution?
Because it was Darwin who made it a scientifically plausible explanation, by providing a mechanism by which evolution could occur....Natural Selection.
What is the smallest level of at which evolution occurs?
Evolution can occur at the level of populations rather than individuals. Changes in allele frequencies within a population over generations is the basis of evolution, and this can happen through mechanisms like natural selection, genetic drift, and gene flow.
What does the unit of evolution depend on?
The unit of evolution depends on the level at which genetic variation is passed on to the next generation. This can occur at the level of individuals, populations, or species. The unit of selection is the entity on which natural selection acts to drive evolutionary change.
6 Explain why evolution by natural selection can not occur if the variation in a characteristic does not contribute to differences in fitness?
If there is not reproductive fitness conveyed by a variant trait, then natural selection has nothing to select and nothing to promote into the populational gene pool.
In the book The Origin of Species does evolution occur by means of natural selection?
Yes, that is what Darwin thought. However this has never been shown to be true.
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.
What must happen for evolution by natural selection to take place?
For evolution by natural selection to occur, there must be genetic variation within a population, some of which must be heritable. The environment must exert selective pressure on the individuals, favoring those with advantageous traits that increase their chances of survival and reproduction. Over time, these advantageous traits will become more common in the population due to differential reproductive success.
Which is the single most important type of mutation that eventually allows for evolution via natural selection to occur?
gene duplication (might give advantages)
