meaning for
calcareous plates
spicules
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the noun. a small or minute, slender, sharp-pointed body or part; a small, needlelike crystal, process, or the like. Zoology . one of the small, hard, calcareous or siliceous bodies that serve as the skeletal elements of various marine and freshwater invertebrates.
MARK BRAINLIEST
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Calcareous is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky. The term is used in a wide variety of scientific disciplines.
Plates means a cover ( of a metal) with thin coating of different metal
Spicules
a minute sharp-pointed object or structure that is typically present in large numbers, such as a fine particle of ice.
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