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In order for evolution by natural selection to occur what has to happen?
Wiki User
∙ 15y ago
There must be genetic variation, the variation must be heritable, and there must be differential reproduction (due to competition).
Wiki User
∙ 15y ago
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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.
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.
What is the third step in natural selection?
There are really no steps in natural selection - just conditions required for it to occur.
How is genetic diversity important to the concept of natural selection?
Without genetic diversity, natural selection cannot occur
What allows natural selection and evolution to occur?
the unequal ability of individuals to survive and reproduce
What allows natural selection and evolution to occur for a tree?
differences in the characteristics of individual trees
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.
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.
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.
Does natural selection occur in the world today?
Yes, natural selection is always occurring.
