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What is natural selection and what are the four principles that must be present in order for it to occur?
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Does natural selection occur in the world today?
Yes, natural selection is always occurring.
What requires natural selection to occur in a population?
genetic variation
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
Are new alleles made by natural selection?
No - natural selection does not create new alleles. Variation in alleles needs to exist in the population in order for natural selection to occur. Natural selection will involve the change in allele frequencies over time, but it does not create new alleles. New alleles are the result of mutations.
How does natural selection provide a mechanism for evolution to occur?
by having sexual intercourse with hoes and getting money
Does natural selection occur in the world today?
Yes, natural selection is always occurring.
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 causes natural selection to occur?
the presence of predators
Can natural selection occur in an individual organism?
No, its a group thing.
What requires natural selection to occur in a population?
genetic variation
Can natural selection occur without variation in a population?
no there is no genetic variation for natural selection to act upon
What term is defined as natural change that occur in communities over time?
Natural selection
Why are variations in a species needed for natural selection to occur?
What would be selected if organisms did not have differences that lead to better survival and reproduction, or the opposite. That is all natural selection is.
What characteristic within populations cause natural selection to occur?
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
Are new alleles made by natural selection?
No - natural selection does not create new alleles. Variation in alleles needs to exist in the population in order for natural selection to occur. Natural selection will involve the change in allele frequencies over time, but it does not create new alleles. New alleles are the result of mutations.
