Fact 1: Echinoderms lack a centralized nervous system.

Fact 2: From animal experiments, it seems to be a central nervous system toxin.

Given the two facts above, answer the question "Echinoderms are resistant to some:" with the following options: 
- starfish
 - enzymes
 - Toxicity
 - pesticide
 - parasites
 - toxins
 - boats
 - chemicals


 

      toxins   