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Balancing selection: Balancing selection refers to a number of selective processes by which multiple alleles are actively maintained in the gene pool of a population at frequencies larger than expected from genetic drift alone. This can happen by various mechanisms, in particular, when the heterozygotes for the alleles under consideration have a higher fitness than the homozygote.
Balancing (international relations): The concept of balancing derives from the balance of power theory, the most influential theory from the realist school of thought, which assumes that a formation of hegemony in a multistate system is unattainable since hegemony is perceived as a threat by other states, causing them to engage in balancing against a potential hegemon.Balancing encompasses the actions that a particular state or group of states take in order to equalise the odds against more powerful states; that is to make it more difficult and hence less likely for powerful states to exert their military advantage over the weaker ones.According to the balance of power theory, states, motivated primarily by their desire for survival and security, will develop and implement military capabilities and hard power mechanisms in order to constrain the most powerful and rising state that can prove a potential threat. This idea illustrates the concept of internal balancing, which is opposed to external, under which states come together and form an alliance to balance and gain more leverage over a dominant or rising power.
Balancing lake: A balancing lake is a term used in the U.K. describing an element of an urban drainage system used to control flooding by temporarily storing flood waters. The term balancing pond is also used, though typically for smaller storage facilities for streams and brooks.