MUTATIONS lead to duplications actually increase the number of genes in a genome.
They help convert nitrogen to nitrate which is usable by living beings. (Living beings can't use regular nitrogen)
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I think it can be best described as sets
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Predator-prey relations are an important driving force to improve the fitness of both predator and prey. In terms of evolution, the predator-prey relationship continues to be beneficial in forcing both species to adapt to ensure that they feed without becoming a meal for another predator.
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