Allopatric speciation is just a fancy name for speciation by geographic isolation, discussed earlier. In this mode of speciation, something extrinsic to the organisms prevents two or more groups from mating with each other regularly, eventually causing that lineage to speciate.
The downside of this is that it can only tell if youâve engaged in drug use in that window. For example, if you smoke marijuana on a daily basis but stop 2-3 days prior to your mouth swab test, the results will probably come back negative. It canât detect prolonged use or the remaining presence of a trace amounts like a urine test can.
NarcoCheckÂ® THC Saliva test (Î´9-THC 25) Detection time of THC in saliva : whatever the test used, THC (the active ingredient in cannabis) can never be detected more than 4 to 6 hours in saliva. The extremely low detection level of the NarcoCheck saliva test allows to fully exploit this window of time. The detection time of our test will therefore be 4 to 6 hours after the last joint smoked, regardless of the level of consumption.