Essay Database

… ignored organism on this planet. People walk past plant and cut them down but nobody ever thinks about what they do for us, what the world would be if there was never any plants or photosynthetic organisms. If the world never had these organisms the…

… the origin of the West Nile virus; comparing the most recent human and equine case statistics in the United States. The comparison will primarily be based on articles found on the Internet, some from scientists and government agencies, and some from…

… hydrogen atoms joined by covalent bonds. Water as a liquid is vital to existence and plays extremely important roles in many aspects of both plant and animal lives. These aspects include temperature control, support, chemical reactions, transport and…

… living cell to make energy available to the body. Energy is vital for us to carry out many life processes such as movement and so respiration in essential to life. During respiration glucose and oxygen are used in a reaction that produces energy and…

… of Membranes The permeability of membranes can be altered in several ways. From previous preliminary work I know that reagents, for example detergents and alcohol alter the arrangement of the phospholipids in the membrane allowing substances…

… Watson and Francis Crick had finally uncovered the structure of DNA, the molecule behind all forms of life on Earth, and their results were published in the journal 'Nature'. This discovery was probably the single most important discovery of the 20th…

… nearly impossible to live without it. It is needed everywhere. Without it we will lose all the modern technology. Now the number one source of energy is fusil fuels, but after about 50 years they will be finished, so it is important to start thinking…

… analyse an aspect of human variation. Hypothesis There will be a positive correlation between an individual's foot length and their hand span. This may be due to linkage; the genes that create these characteristics may be positioned on the same…

… how a small piece of potato affects the rate of reaction with hydrogen peroxide. For this investigation the following could be changed could changed: ·Concentration or hydrogen peroxide ·Surface area of potato ·Temperature ·Mass of potato …

… inside the skull. The brain is the control center for movement, sleep, hunger, thirst and all othervital activities. All emotions like anger, fear, sadness are controlled by the brain. The medulla oblangata is the long lower most part of the brain…