… American coco plant. Cocaine deadens skin and mucous membranes. A doctor may use it to deaden the area around a wound before he cleanes it or takes stitches. When it is taken internally, cocaine causes a temporary stimulation of the nervous system…

… marijuana? That is a common question asked by many people. Since this paper is worth quite a few marks I guess I will answer in a civilised way, and not try to make marijuana look good. Before I tell you about the effects, you should know a little…

… as chew, dip, or snuff, is the new alternative for smoking. As a child of a smoker I have personally chosen to stay smoke free, but each and every day I am confronted with the choice to smoke or not. To my surprise I have also seen many of my…

… and often limits plant development. For example, when the grass does not receive sufficient water, its growth slows and ceases long before it starts to look sick and turn brown. Water is required to maintain cell turgidity and to provide a substrate…

… called the biosphere, including the earth's air, soil, water, and living organisms. Constituents of the Environment Throughout its long history, the earth has changed slowly. Continental drift separated landmasses, oceans invaded and retreated…

… the mind will inevitably lead to a messy and perplexing conversation and conclude with no definitive answer. This paper cannot possibly expect to settle the complex questions that arise from the conversation of the mind. It is the purpose…

… is solving this mass extinction is to ask, were there any others. The answer is a resounding yes. Altogether over time there has been about eight mass extinctions to large land dwelling vertebrates. The most recent was about ten thousand years ago,…

… life and the processes that led to its diversity. Based on the principles of adaptation, chance, and history, it seeks to explain all the characteristics of organisms. Do specific choices made by female insects and spiders, when selecting a mate,…

… is composed of bacteria and cyanobacteria, one-celled (sometimes colonial) organisms whose cells lack a nuclear envelope, mitochondria, or plastids. They reproduce asexually through fission (splitting in two) and mainly gain their nutrition by absorbing…

… century, Sigmund Freud, the father of psychoanalysis, developed the concept that the basis of the human psyche is three functional parts- the id, ego, and superego. Oscar Wilde’s The Portrait of Dorian Gray molds the main characters Dorian,…