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Usually a change in the envirnoment where one group will do better and the other group will move to find a new place where they can thrive.
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∙ 10y ago
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What must occur for a population to diverge?
Reproductive isolation: a decline in interbreeding frequency between two segments of the ancestral population.
What must occur for a population to grow?
The rate of reproduction must be higher than the mortality rate.
Must spores occur in mitosis?
yes , it is essential for mitosis to occur in an amoeba in order for the cells to reproduce
What condition is necessary for genetic drift to have a significant effect on a population A natural disaster must occur. The population needs to be small. Gene flow must occur. A portion of the p?
The population needs to be small is the necessary condition for genetic drift to have a significant effect on populations.
Why must there be variation in a population in order for natural selection to occur?
What would there be to select from if all the organisms in a population were not different in morphology and behavior. Some of these differences are reproductively successful against the immediate environment, and that environment is the natural selector.
What must occur for a population to diverge?
Reproductive isolation: a decline in interbreeding frequency between two segments of the ancestral population.
Why must a population have a genetic variation in order for natural selection to occur?
Without variation there is nothing to select from.
How are speciation and reproductive isolation related?
For speciation to occur, one population must diverge genetically from another. Divergence is very difficult if the two populations exchange genes readily between them. A short rule of thumb to remember is:Populations which exchange genes are more alike genetically than those that don't.This means, in order to diverge genetically from one another, there must be some barriers, or reproductive isolation, to gene flow between them. When there are these barrier to gene flow, each population can accumulate different mutations and combinations of alleles independently of the other, thus diverging genetically.
What must happen for specification to occur?
A population must be isolated in some way
What must occur for a gene pool within a population to change?
A genetic mutation within the population.
In order for conduct to occur two objects must occur?
Two objects must be touching and it has to transfer heat
What must occur for a population to grow?
The rate of reproduction must be higher than the mortality rate.
What are the conditions a population must meet in order to have genetic equilibrium?
1. No net mutations occur; that is, the alleles remain the same 2. Individuals neither enter nor leave the population 3. The population is large (ideally, infinitely large) 4. Individuals mate randomly 5. Selection does not occur
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).
Must spores occur in mitosis?
yes , it is essential for mitosis to occur in an amoeba in order for the cells to reproduce
What must occur in order for plants remains to be changed into a fossil fuels?
they must be buried.
What condition is necessary for genetic drift to have a significant effect on a population A natural disaster must occur. The population needs to be small. Gene flow must occur. A portion of the p?
The population needs to be small is the necessary condition for genetic drift to have a significant effect on populations.
