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the unequal ability of individuals to survive and reproduce
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What allows natural selection and evolution to occur for a tree?
differences in the characteristics of individual trees
What is a requirement for evolutionary changes to occur through natural selection?
Evolution occurs through natural selection via survival of the fittest. This means that those organisms that are most well adapted to the environment will survive and pass on their genes.
How may natural selection be able to cause evolution to occur?
By selecting the variant organism most suited to the environment the alleles of the population then change in frequency over time and thus evolution occurs.
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 is the most important force in shaping evolution?
Evolution has two key driving forces without which it would not occur, but with which it must occur: The first is reproductive variation: this basically asserts that each organism is slightly different from both its parents and its siblings. The second is differential reproductive success: this asserts that features that allow their bearers to reproduce more successfully than members of the same species with different features are likely to be present in a greater part of the population in coming generations. In other words: the key driving forces behind evolution are variation and selection.
What allows natural selection and evolution to occur for a tree?
differences in the characteristics of individual trees
Which is the single most important type of mutation that eventually allows for evolution via natural selection to occur?
gene duplication (might give advantages)
What are the 4 mechanisms by which evolution can occur?
genetic drift, mutation, natural selection, and migration
How does natural selection provide a mechanism for evolution to occur?
by having sexual intercourse with hoes and getting money
What are three reasons for natural selection to occur?
1. different breeding 2. evolution 3.adaptation
Generally evolution by natural selection occurs quite slowly over?
Evolution through natural selection occurs slowly over millions of years. It has been hypothesized that evolution is the result of positive mutations that occur in a community of organisms that help them survive better. Evolution is essentially descent with modification.
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.
Can the cultural evolution occur faster than biological evolution?
Yes, cultural evolution can occur much faster than biological evolution because cultural traits can be rapidly spread and adopted among populations through communication, imitation, and technology, whereas biological evolution relies on genetic changes that accumulate over generations through the process of natural selection. This allows cultural adaptations to occur more rapidly in response to changing environments or social needs.
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 a requirement for evolutionary changes to occur through natural selection?
Evolution occurs through natural selection via survival of the fittest. This means that those organisms that are most well adapted to the environment will survive and pass on their genes.
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.
In order for evolution by natural selection to occur what has to happen?
There must be genetic variation, the variation must be heritable, and there must be differential reproduction (due to competition).
