Answer to Question 1
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Answer to Question 2
Some marketers say that everything we buy has some element of a good and some element of a service. They maintain that perhaps only raw materials such as coal or wheat are examples of pure goods. Everything else has been processed, and that processing is a value-added service. Thus, we can examine any business and consider what are its core versus its value-added services. Distinguishing these elements also helps us identify our competition. For example, when a car is purchased, the provision of the automobile itself might be considered the core purchase; it's the corporate fundamentals, the reason the car maker is in business. These are the qualities that the company better get right; they're the basics of what customers expect. The value-added supplemental services are those on which the car company might distinguish itself; it might claim that its financing and service plans are more generous, its people more competent and friendly, etc.
Cavalier King Charles Spaniels demonstrate with-breed variation.
SSRIs block the reuptake of serotonin into nerve terminals, resulting in increased serotonin levels.
DNA sequence variation in the human genome
Binding site variation for transcription factor CEBPA along gene PCK1 as determined by ChIP
Two ways of generating genetic variation in meiosis