<span>When a gene changes within a population over time, it is referred to as evolution. This refers to a long but steady rate of mutations that occur in genes of organisms within the environment. A lot of factors affect a population's evolution (e.g. climate, reproduction, food source) and it is a determinant whether a species will survive for the next generations. </span>
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Gene expression is the process by which the information encoded in a gene is used to direct the assembly of a protein molecule. The cell reads the sequence of the gene in groups of three bases.
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Noble gases are the group 0 elements and are all considered as the unreactive non-metal gases. Their application relies upon their low density, inertness, and non-flammability. In comparison to other elements, the noble gases are inert, that is, they are excessively unreactive.
Generally, when the elements react, their atoms complete their outer shells by gaining, losing, or sharing electrons. The noble gases atoms already possess complete outer shells, thus, they do not possess the tendency to gain, lose, or share electrons. This is the main reason why noble gases are inert and are not involved in chemical reactions.
