Final answer:
The four assessments are evaluating dose proportionality, assessing the margin of safety, toxicokinetic studies, and analyzing LD50 values.
Step-by-step explanation:
The four scientific assessments used to determine the toxicology of a pesticide are evaluating dose proportionality, assessing the margin of safety, conducting toxicokinetic studies, and analyzing the lethal dose (LD50 values). Dose proportionality involves understanding how the toxic effect of a pesticide increases with the dosage. Assessing the margin of safety compares the effective concentration with exposure levels to ensure safety. Toxicokinetic studies look at how the pesticide is absorbed, distributed, metabolized, and excreted in an organism. Finally, determining the LD50 provides an estimate of the pesticide's toxicity by measuring the dose required to kill half the members of a tested population, usually laboratory rats.