AP Environmental Scienceeasymcq1 pt
LD50 measures
A.the dose lethal to 50% of a test population
B.the dose safe for all organisms
C.the pollutant concentration in water
D.the lifetime of a pollutant
Explanation
Core Concept
LD50 quantifies acute toxicity: a lower LD50 means a smaller dose kills — the standard comparison across chemicals.
Correct Answer
Athe dose lethal to 50% of a test population
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