The geologic time scale is referred to as the system of chronological dating which is related to geological strata to time. It is used by palaeontologists, geologists and earth scientists to describe the relationship of events and timing that occurs during Earth’s history. The primary division of time is defined as eons. Eons follow a sequence of the Archean, the Hadean and the Proterozoic which are referred as Precambrian superon.
Eons are divided into an era whereby those eras are subdivided into periods, ages, and epochs. Eon, epoch, period and ages correspond with eonothem, series, systems and stage which are mostly used to refer to layers of rock which then stretches to geologic time in the history of the earth.
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Inner stem cell mass
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Harvested Unspecialized Embryonic Stem Cells
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A leaf consists of three main parts: i) the petiole, ii) leaf base, and iii) lamina or leaf blade. Functions. Making food for the plant with the help of sunlight, carbon dioxide, and water through photosynthesis. Helping in reproduction such as in Bryophyllum, a group of sprout leaf plants.
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