Final answer:
Probes and methane detectors are not typically used to detect non-culturable prokaryotes; instead, polymerase chain reaction and electrophoresis are key molecular biology techniques employed for this purpose.
Step-by-step explanation:
The combination of probes and methane detectors are not specifically a good example of a non-intrusive search technique for detecting non-culturable prokaryotes in an environmental sample. Instead, molecular biology techniques such as polymerase chain reaction (PCR) and electrophoresis play crucial roles in identifying and amplifying selected portions of prokaryotic DNA. PCR is used to exponentially amplify the desired DNA segments, while electrophoresis is a method for separating DNA fragments according to their size for analysis, not for amplification purposes.