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All living objects are composed of cells, including you. Cells are the basic element of existence. Such cells are known as prokaryotes and eukaryotes. Procaryotes are cells not possessing a nucleus, or organelles comprising the genetic material of a cell, or other membrane-bound organelles.
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The geologic time scale is the calendar for events in Earth history. It subdivides all time into named units of abstract time called escending order of duration eons, eras, periods, epochs, and ages.
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Five planets — Mercury, Venus, Mars, Jupiter, and Saturn were known to the ancients. ... However, the planets moved relative to the stars. For this reason they were called wandering stars. Our word "planet" comes from the Greek word planetes, meaning "wanderer
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Nitrogen Base
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the square is where the bases connect to get different patterns inside your DNA