The economic importance of gymnosperms given in plant kingdom ncert are:    1. The seeds of Pinus gerardiana are roasted and eaten.     2. The softwood of gymnosperms is used in the construction of furniture, plywood, packing cases, match sticks, railway sleepers etc.     3. The wood from  Picea, Pinus, Larix and  Abies is used in the manufacture of paper.     4. Pine needles are used to make fibre boards.     5. Resins containing terpenes, resin acids and esters can be obtained from gymnosperms. Resins are used in waterproofing, sealing joints etc.