Toxicological Trivia from December 14, 2009: Which of these three criteria unlike a lizard from a snake?
a) No legs;
b) Unique jaw;
c) Ability to produce poison.

Correct answer: b. Snakes have his jaw broken in two hemimandibular hinged medially, which allows them to swallow prey whole because they do not have chewing teeth. There are lizards and lizards nicknames (one genus – Heloderma-two species) that produce a poison of toxicological significance to man. Read more in monograph in Spanish:  "Venomous Animals of Argentina. Items for recognition and first aid measures in case of accidents (2006)".