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How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?
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45 points how are people today being protected from tsunamis? earthquake data is analyzed to detemrine if a tsunami is likely, and if so, warnings are sent out. areas in tsunami risk zones are no longer heavily populated. radar is used to measure wave heights regularly. meteorologists study the winds to determine if wave heights will be large.
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Pls pls pls help
why do certain species become extinct after an environmental over other species?...
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