The behavioural cue of ‘flexible self-protection’ is a way to establish whether an animal feels pain, scientists say
Crickets that received the hot probe “overwhelmingly” directed their attention to the affected antenna – they groomed it more frequently, and tended to it over a longer period of time, he says. “They weren’t just agitated and flustered. They were directing their attention to the actual antennae that was hit with this hot probe.”
Plants don’t have nerves at all, so no
OK, yeah. They don’t, but they do have chemical receptors. They don’t technically have a nervous system, but they can react to stimuli.
A bear trap can react to stimuli