.... view of the environment. For the purpose of simplicity this essay will concern itself with only the brain of a rat. This essay will thus discuss the evolution of relevant behaviourist and neurophysiological theories, the most important being O'Keefe (1991); Muller, Kubie, Bostock, Taube and Quirk (1991); and Rolls (1991). The behaviourist theories proposed that a reward or aversive object/event will motivate a rat to move towards or away from the location along a reward gradient, and this has been shown to be the case with rats in a maze situation (O'Keefe, 1983). Indeed, this situation does not require the rat to have a concept of absolute space; it ma .....

.... kinds of ; slab and loose snow. Loose snow are minor and usually never exceed 20 miles per hour. While slab are the destructive and deadly mountain slides. It is not uncommon for one of these to destroy a small town or forest. Since loose snow aren’t very dangerous, I will discuss slab . The fundamentals of how these snow masses occur, what to look for when testing and just all-together prevention. The basic chemistry behind a slab avalanche is when one layer of snow does not bond to the layer below it. Any kind of temperature change, fresh snowfall, the weight of a person, all can cause the slab to break free from the lower layer. The formation of a slab is .....

.... site and facility to their customers to buy products online. In the 21st century each and every individual among us will be running out of time and nobody wants to go out to shop and waste 4 to 5 hours rather every one of us would prefer to shop online at the same price and get delivered at our door step. The electronic retail marketplace demands the highest attention to visual graphic design quality, coupled with the ability to construct an electronic catalog. This catalog must support multiple layouts and instant credit card transaction processing. There are certain advantages and disadvantages of trading on the net. ? One can buy each and every product si .....

.... fungi are unable to manufacture food out of the raw materials around them as other plants do. They must therefore get nutrition from other plants and from animals. When they get their food from living plants or animals, fungi are called parasites. When they get it from dead plant or animal matter, they are called saprophytes. Fungi are very widely distributed throughout the world, particularly in the temperate and tropical regions where there is sufficient moisture for them to grow. They are less likely to be found in dry areas. Some few types of fungi have been reported in Arctic and Antarctic areas (some molds, after all, thrive on refrigerated food). The .....

.... can have an enormous impact on the ecological organization and structure of communities. The processes of predation affect virtually every species to some degree or another. Predation can be defined as when members of one species eat (and/or kill) those of another species. The specific type of predation between wolves and large ungulates involves carnivores preying on herbivores. Predation can have many possible effects on the interrelations of populations. To draw any correlations between the effects of these predator-prey interactions requires studies of a long duration, and statistical analysis of large data sets representative of the populations as a .....

.... to occur in infants. Symptoms of problems include snoring and sleeping with neck in a hyperextended condition. The limbs have rhizometic shortening. The legs are straight in infantry but when a child. He begins walking they develop a knock-knee position. When the child continues to walk legs begin to have a bowed-leg look. Occasionally, these curvatures are fixed. As the child continues to walk the kyphosis disappears and the back assumes a lordotic posture. If a delay in child’s walking occurs, the spine should be monitored closely for signs of gibbous formation. In infancy, hypercephalus can occur. Infants head circumference should be monitored close . Mon .....

.... a strong sugar backbone. The DNA molecule then recoils.ATP is needed for transcription to occur. Translation- Translation of RNA occurs when the transcribed RNA from the nucleus , which is now called messanger RNA [mRNA] as it contains the protein information. This mRNA leaves the nucleus through a nuclear pore, DNA is too large a molecule to do this, to the cytoplasm. In the cytoplasm there are free transfer RNA [tRNA] molecules which hve three protruding bases these sets of three on the tRNA are called anti-codons. Each tRNA molecule attracts different amino acids, of which there are around twenty, and they "stick" to the tRNA and depending on which tRNA .....

.... solutes. The solvent is always a liquid and in most cases the solvent is water but it is not limited to water. Alcohol is also a common solvent. Solutes are usually solid substances, and they are not limited to only being solids, for example another liquid can be the solute. Some liquids can dissolve in each other in any proportion; others have limits. If a solute added to a solution above a certain amount will not dissolve, the solution is called saturated. For most substances, solubility increases with increasing temperature of the solvent. In general, molecules that are structurally similar to the molecules of the solvent have the highest solubil .....