Fig. 4

Photomicrographs of comet assay (DNA damage) in Ruditapes decussatus cells isolated from digestive gland tissues following exposure to different bisphenol A concentrations (1 and 5 µg/L) for a period of 21 days of experimental time comparing with a control group. (A) control, (B) 1 µg/L, and (C) 5 µg/L. Abbreviations: H: head and T: tail