Cell growth (%), normalized to the negative control group (100%, represented by the red dashed line), and relative standard deviation of days 0 (initial) and 6 (final) of exposure to acrylonitrile-butadiene-styrene microplastics (ABS-MP) at three concentrations: 384, 3840 and 38,400 items L⁻¹. (A) Chlorella vulgaris (in green). (B) Raphidocelis subcapitata (in pink) Equal letters indicate no significant difference and different letters indicate a significant difference between the groups at different exposure times (days 0 and 6) (Fisher's exact test). The asterisk symbol (*) represents a statistically significant difference between the treatments and the control group (Dunnet's test). p value considered significant p < 0.05.