Gymnosperm

From time immemorial food, clothing, and shelter have been the three great necessities of mankind. Wood is the most familiar and most important forest product. Wood has contributed a lot to the advancement of civilization. Today, wood is the most widely used commodity other than food and clothing. It is …

The term ‘Spice’ refers to any dried part of a plant, used for seasoning and flavoring a dish, but not used as the main ingredient. Parts of a plant including dried bark, roots, berries, seeds, twigs, or anything else that is not the green leafy part, is known as a …

Gymnosperms are seed producing plants which do not produce any covering surrounding seed. Cycas and Gnetum are two example of Gymnosperms that are respectively considered as primitive and advanced species. In this article, Primitive characters of Cycas and advanced ones of Gnetum will be discussed explicitly. CYCAS Cycas is a …

Gymnosperms are vascular plants that reproduces by means of an exposed seed, or ovule—unlike angiosperms, or flowering plants, whose seeds are enclosed by mature ovaries, or fruits. The seeds of many gymnosperms (literally “naked seeds”) are borne in cones and are not visible until maturity. So far Taxonomists have recognized 88 genera and more …

Many systems of classification of Gymnosperms have been proposed by different authors. According to the Classification of  Sporne (1965), Gymnosperms are classified into three classes. Among them, Gnetopsida is the third one. In this article, the only order of Gnetopsida is discussed in detail. Related articles Orders of Coniferophyta Orders of …

Many systems of classification of Gymnosperms have been proposed by different authors. According to the Classification of Sporne (1965), Gymnosperms are classified into three classes. Among them the second one is Coniferopsida. In the previous article, Orders of the first Class Cycadopsida were portrayed. Click here to see the Article. …

Many systems of classification of Gymnosperms have been proposed by different authors. According to the Classification of Arnold (1948) & Sporne (1965), Gymnosperms are classified into three classes. Among them, first one is Cycadopsida. In this article, three orders under Cycadopsida will be discussed in detail. Get Free Netflix Now Best …

Fibre may be defined generally as a strand that is very long in comparison to its width. Or, it is a special type of elongated cells with thick walls corresponding to small cavities with pointed ends. • The walls of the fibre contains lignin and cellulose. • They may occur …

Gymnosperms are seed-producing plants that do not produce any covering surrounding the seed i.e. the seed remains naked. The word ‘Gymnosperm’ originates from Gk. ‘gymnos’ meaning ‘naked’ and Gk. ‘sperma’ meaning ‘seeds’. A Greek botanist named Theophrastus first used the term ‘Gymnosperm’ in 300 BC in his book ‘Enquiry into …

Introduction Rubber is a polyterpene consisting of a long chain of thousands of isoprene units. Isoprene is a five carbon compound and a basic unit of rubber. The isoprenes are joined together end to end to form a giant molecule called polymer. The word rubber was first used by Priestly …