Linked from
The 13 pages that link to Plant resin, each with the reason it gives.
ConiferRelated: Many conifers produce resin that seals wounds and deters insects and pathogens.
PinusRelated: Resin canals in pine tissues produce substances that seal wounds and deter attackers.
MicrolithRelated: Resin could help secure microliths within slots or bindings.
PineRelated: Pine resin flows through canals and helps defend damaged tissues.
CedrusRelated: Resin ducts in cedar wood and bark help defend damaged tissues.
CenserRelated: Frankincense and other resins can be placed on heat inside a censer.