Exploding Termites

According to an article on the website Science Now (the website/magazine for the American Association for the Advancement of Science), scientists studying termites in French Guiana found a species with "blue crystals" in what looks like the anterior of their abdomens, see image) that "explode" when touched. the explosion releases an enzyme that becomes toxic when combined with certain proteins, ostensibly those of attackers. Only aged termites in a colony have the crystals; thus, the aged apparently commit suicide to repel attackers.

First of all I'd like to emphasize that this is not a strategy that humans should emulate.
Second, though -- and putting to the side the cool enzyme protein mixing thing (the means of delivery of which I think make the termites poisonous not venomous) which is what got the scientists all excited (apparently it's the first time termites have been discovered that do this) -- is the evolutionary aspect of elderly termites sacrificing themselves for their colony. This is obviously genetic or meta-genetic since it involves the development of an enzyme on the body. Evolutionist denialists sometimes ask how a creature can evolve genes to destroy itself if per se the act of destruction prevents passing on the genes. the answer is that the sacrificing organism shares a genotype with those who are saved by the sacrifice. Since they are saved they go on to pass on the gene. (And it is fair to assume that if the gene was not effective in saving them, then they would have all died.) Evolution, in short, favors sacrifice of individuals in some instance.  Indeed this is not uncommon: most human cells undergo lysis.