The economically valuable excretory product of coniferous trees is/are ________.
Resins and Gums
Coniferous trees excrete waste products such as resins and gums which have high economic value. Resins are valued for their chemical properties and associated uses such as the production of varnishes, adhesives, and food glazing agents. They are also prized as an important source of raw materials for organic synthesis and provide constituents of incense and perfumes. Gum resins containing essential oils are used for therapeutic purposes.