LC50 refers to the lethal concentration that kills what percentage of test animals?

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Multiple Choice

LC50 refers to the lethal concentration that kills what percentage of test animals?

Explanation:
LC50 is the concentration of a substance that kills half of the exposed animals within a defined period. It’s the median lethal concentration: the point on a dose–response curve where 50% mortality occurs. This value comes from testing different concentrations and observing what fraction of animals die at each level. A lower LC50 means the substance is more toxic, since a smaller concentration causes death in half the population. Keep in mind that LC50 depends on exposure time, the species tested, and the route of exposure. The other percentages (25%, 75%, 100%) correspond to different points on the curve and are not the LC50.

LC50 is the concentration of a substance that kills half of the exposed animals within a defined period. It’s the median lethal concentration: the point on a dose–response curve where 50% mortality occurs. This value comes from testing different concentrations and observing what fraction of animals die at each level. A lower LC50 means the substance is more toxic, since a smaller concentration causes death in half the population. Keep in mind that LC50 depends on exposure time, the species tested, and the route of exposure. The other percentages (25%, 75%, 100%) correspond to different points on the curve and are not the LC50.

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