Not all cannabinoids identified are present in all cannabis products. The main ones detected are THC, CBN, CBD, CBG and CBC, and there is enormous variation in their quantitative ratios, from strain to strain and even crop to crop, depending on other non genetic factors such as light, available nutrients and minerals, etc. The adaptive significance of the resin glands remains speculative but most probably they act as defense compounds against insect and fungal attack.
