Tag: uses of gymnosperms

Turpentine oil is made from the resin of certain pine trees. It is used as medicine. Don't confuse turpentine oil with gum turpentine, which is the resin. Turpentine oil is applied to the skin for joint pain, muscle pain, nerve pain, and toothaches. So, the correct option is "C" (Most kinds of pine trees).

Surface fibers are fibers found on the covering of seeds, leaves, or fruits; cotton cloth is made from seed hairs covering the surface of cotton seeds. Gossypium is a genus  of 39-40 species of shrubs in the mallow family, Malvaceae. It is native to the tropical and subtropical regions of both the 'Old World'  and the 'New World'. The cotton plants, sources of commercial cotton fabric, are included in this genus. 

Chilgoza pine (Pinus gerardiana) is well known for its edible pine nuts, rich in carbohydrates and protein . The seeds are locally called and marketed as "chilgoza".

Sago is a starch extracted from the pith of the stem of the Cycas plant.

Heterospory, seed formation and fertilization are found in gymnosperm. 

Araucaria is commonly known as the Christmas tree or monkey puzzle tree and is widely grown for its ornamental appearance.

Monospory means having tetranucleate or simple spores while tetraspory is the formation of four haploid spores after meiosis.

Rosin and turpentine are oleoresins obtained from the resin ducts of Pinus species.

Chilgoza (Pinus gerardiana) is a gymnosperm whose seeds are edible and commonly consumed.