A process in nature in which organisms possessing certain genotypic characteristics that make them better adjusted to an environment tend to survive, reproduce, increase in number or frequency, and therefore, are able to transmit and perpetuate their essential genotypic qualities to succeeding generations.
A watchglass can be used as a beaker cover, but you can also place small amounts of chemicals on it and then heat it (for example, to evaporate some water from a wet chemical). From Wikipedia: A watch glass is a circular, slightly concave piece of glass used in chemistry as a surface to evaporate a liquid, or as a cover for a beaker. The latter use is generally applied to prevent dust or other particles entering the beaker; the watch glass does not completely seal the beaker, and so gas exchanges still occur.
Samsung Gear S is a lovely curved smartwatch with AMOLED display. The screen size is bigger which is an advantage and the touch is smooth. This is the first Samsung smart watch that supports a micro SIM card and lets users use it independently. Although, you have to connect with your smartphone initially to work. Samsung makes good products, so you donât have to doubt about its build quality. Gorilla Glass 3 makes it even stronger.