The word "mycotoxins" means © food poisons parasitic poisons fungus poisons O bacteria poisons​

I think the answer is food poison

The main difference between a chordate and a non-chordate is that the former has a notochord present in at least a stage in their life cycle while the latter will not have a notochord at all. Also, the former will at some stage or even throughout their life possess a post-anal tail while the latter will never possess a post-anal tail. I think what you mean by "tail" is the hindmost part of a nonchordate like an earthworm, if so, then the difference would be that in chordates, the "tail" is located after their anus while in the non-chordates, it is just basically the structure located rearmost of the animal.