                                      tence 1: 3 It should be noted that  he toxicity (LC50) of a sample  bserved in a range-finding test may  e significantly different from the    definitive Led is longer; and (2) the   may formed with a  ‘ample Due at a different time,  nd possibly differing significantly  in the level of toxicity.    tence 2: The toxicity of a sample  n the range-finding test might be  ery different from the toxicity in    