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Which of the following is true?
Organic Polymers
Large molecules composed of repeated subunits (monomers) that are typically carbon-based, like proteins, nucleic acids, and plastics.
Silt
Fine particles of rock and soil that are smaller than sand and larger than clay, often found on riverbeds and fertile agricultural lands.
Sand
Fine particles of rock and mineral matter, typically found on beaches, deserts, and riverbeds.
Paleozoic Era
That part of geologic time extending from roughly 541 million to 252 million years ago; divided into six periods: Cambrian (appearance of many new animal groups, the Cambrian radiation or Cambrian explosion); Ordovician (diversification of sea life); Silurian (appearance of jawed fishes, terrestrial plants, and air-breathing animals); Devonian (appearance of sharks and bony fishes); Carboniferous (great.
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