My thoughts stemmed from reading the above article, you can read below.
Swarming bacteria "scream" when they die, warning neighboring bacteria of danger.These death shrieks aren’t audible; rather, they are chemical alarms that the bacteria broadcast while on the verge of death, an action known as necrosignaling.
Through necrosignaling, bacteria alert their swarming neighbors to the presence of a deadly threat, and thereby save the majority of the swarm (a bacterial colony that’s on the move).
When confronted by a threat such as antibiotics, the bacteria’s chemical death cries can provide survivors enough time to acquire mutations that convey antibiotic resistance, scientists reported in a new study.
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My analysis starts with the question of how did the shrieking-at-death behavior functionally develop OR evolve?
NOTE: We must take care to NOT attribute intention to bacteria’s behavior. Rather we should focus on the function of their behavior.
The article conveys that the dying screams of bacteria who are being killed by antibiotics, “can provide survivors enough time to acquire mutations that convey antibiotic resistance.”
This brings up a related question: How did the screaming as a warning at death, evolve or develop functionally?.
Now consider the function of screaming at death. Could it be a simple reflexive behavior? Probably so. But a behavior is not a verbal behavior if it does not/or is not perpetuate/d by reinforcement from a listener.
In the case of these bacteria, the role of “listeners” appears, at least at face value, to be the “survivor bacteria”. Yet it is the surviving bacteria’s behaviors that are “reinforced” by the warning that signals them to escape.
Hence, I surmise, that (in the context of the bacteria’s historical evolution) the “screaming at death” probably developed first as a persistent natural reflexive artifact of being killed. Subsequently, over time, surviving bacteria evolved to escape the circumstances of the impending massacres, by being the surviving bacteria that did successful escape behaviors.
I suppose that in the context of evolution, the bacteria that had mutations that led to successful escape when detecting the screams, MUST HAVE also retained (or enhanced) the screaming at death reflex.
So anyway, in a nut shell, I would say that this does not look like full blown verbal behavior, to me. But it might well depict a component of how verbal behavior has developed over the course of all species evolution.
I welcome any questions about this, or any feedback that detects a problem with my impromptu analysis.