Can consciousness (qualia) cause detectable and measurable effects? For example, would we able to tell the difference between a robot that experiences qualia vs. a robot that doesn't, by detecting the effects of qualia in the robot that has them?
If qualia do cause measurable, detectable effects, do these effects offer survival advantages from an evolutionary standpoint? I'm thinking of the standard naturalist account of the origin of life on Earth: Big Bang -> Solar System formation -> primitive Earth -> Abiogenesis -> Evolution. If qualia produce effects, was there a specific mutation (the qualia mutation) in the last step (Evolution) that caused an organism to experience qualia, offering it a survival advantage over other organisms that didn't?