Fig. 3

a Percentage of biology majors (black bars, n = 234) and nonmajors (white bars, n = 227) who agree with one of the following statements concerning their own education: A = I prefer science courses where evolution is discussed comprehensively and humans are part of it, B = I prefer science courses where plant and animal evolution is discussed but not human evolution, and C = do not know enough to say. Raw data chi-square = 11.879, df = 2, P ≤ 0.01; asterisk indicate Sign test two-tail pair-wise comparison P ≤ 0.01. b Percentage of freshman (F), sophomore (So), junior (J), and senior (Sr) biology majors who agree with statements A, B, or C (above) concerning their own education. Chi-square of percentage values = 13.676, df = 6, P value = 0.033