The North Carolina End-of-Course Testing Program was established to provide student, school, and school system information about achievement in high school courses. This report describes: (1) "Characteristics of Biology Students"; (2) "Student Performance on the Core Test"; (3) "Anticipated Final Grades and Scores on the Core Test"; and (4) "Average Performance on the Curriculum Test." Each Biology student took a test containing 66 common or core items and one of five different sets of 34 items during the final days of the school year. The average core score was 39.2, or 59.4 percent correct. Average scores differed by parental education, ethnic group, grade level in school, and anticipated final course grade. The select group of students taking Biology in the ninth grade had higher average scores than students at any other grade level. Performance in educational regions and public school systems, and state percentile tables for 1987-1989 are provided in the appendices.(YP)