… nucleic acids, which are the building blocks of all living things. Nitrogen makes up most of the atmosphere, but the N2 in the atmosphere cannot be used by most organisms. Nitrogen fixation is the process by which atmospheric nitrogen is transformed…

… ones require an environment or a physical body to be expressed. The major significance of an innate behavior is that differences of environments or physical bodies do not affect the behavior. In behavioral biology, innate behavior is a behavior…

… has wondered he mechanisms of Nature since time infinite. This quest for the truth, the ways in which his surrounding works, has led to many a scientific discoveries and innovations. Since the art of making fire and creating handcrafted tools,…

… a substance to move down its concentration gradient from a more concentrated to a less concentrated area. This means that molecules move from an area of where there is a high concentration of them to where there is a low concentration. Osmosis is…

… specificity. The first variable is an enzyme's primary structure. A primary structure is just a combination of amino acids. There are twenty different amino acids that the primary structure can be created from. Every enzyme has a different order…

… cancer? This is a very difficult question to answer. During the past centuries, billion of dollars have been spent trying to answer this question. Even after all the time and money spent, no definite answer exists. There is, however, a clear understa…

… brain disorder for which there is, at present, no effective treatment or cure. HD slowly diminishes the affected individual's ability to walk, think, talk and reason. Eventually, the person with HD becomes totally dependent upon others for his…

… - anamalia, phylum - Arthropoda, Class - Crustacea, Order -Decapoda , and family - Cambaridae. Habitat Crayfish like to be where it's dark and cool, and during much of the daylight they will be found by them selves, under a rock or vegetation,…

… by disease of the optic nerve or retina. Acquired color vision problems only affect the eye with the disease and may become progressively worse over time. Patients with a color vision defect caused by disease usually have trouble discriminating…

… frequently fatal genetic disease of the body's mucus glands. CF primarily affects the respiratory and digestive systems in children and young adults. Sweat glands and the reproductive system also are usually involved. On average, individuals with CF…