Question

LD50 in a toxicity test stands for ______

a) a dose that will kill 50% of an exposed population
b) a dose that would not affect or harm 50% of an exposed population
c) a dose that will kill 25% of an exposed population
d) a dose that would not kill 25% of an exposed population

Answer 1

a) a dose that will kill 50% of an exposed population.