Morphological disorder is commonplace in bioworld structures, as exemplified by the layered helical structures in the exocuticle in many beetle species. Circular-polarization-state selective reflection from disordered chiral structures was theoretically explored, the disorder being that each helical turn may be different from its adjacent helical turns. The boundary-value problem of plane-wave reflection by a disordered chiral structure was solved. Numerical results indicate the remarkable resilience of circular-polarization-state-selective reflection against morphological disorder.