Admission requirements for a Ph.D. in Toxicology may vary by institution but generally include: - Educational Background: A bachelor's or master's degree in toxicology, biology, chemistry, or a related field. - GRE Scores: Some programs require Graduate Record Examination (GRE) scores. - Letters of Recommendation: Typically, 2-3 letters from academic or professional references. - Statement of Purpose: A detailed essay outlining your research interests and career goals. - Interview: Some programs may require an interview as part of the selection process.