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Effect of small numbers of individuals on changes in the frequencies of an allele
Explanation:
By definition population genetics studies the changes in genetic variation of a population, this involves the modelling of changes in the frequencies of genes and alleles.
For example if an organism is born with a color that enhances its reproduction that population may change drastically in appearance, on the contrary if the allele causes a genetic disease, the population numbers might decrease.
Plate tectonics, theory dealing with the dynamics of Earth’s outer shell—the lithosphere—that revolutionized Earth sciences by providing a uniform context for understanding mountain-building processes, volcanoes, and earthquakes as well as the evolution of Earth’s surface and reconstructing its past continents and oceans.
That is the theory of Plate Tectonics.
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In the context of the neural impulse, the membrane that encases the axon is called semipermeable because FLUIDS CAN SOMETIMES FLOW INTO OR OUT OF IT.
Semi permeability is the ability of the membrane to allow certain substances, not all, to pass through it.
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