Artifact dating terminology

D.remains of a plant or animal of a species that is known to have lived only during a specific time period.

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The effective time range for OCR dating has not yet been male sex spores of flowering plants.Proteins are composed of different combinations of amino acids assembled in chain-like molecules.Amino acids are primarily composed of carbon, oxygen, hydrogen, and nitrogen.Pollen particles are usually nearly invisible, except in large concentrations, due to their extremely small size.They can survive for hundreds of thousands of years in silty, anaerobic soils, such as mud sediments at the bottom of a lake.

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