Cual es importancia de las aguas oceanicas y continentales

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Which technology do environmental scientists use to track the movements or polar bears and other vulnerable populations? a) geographic information system(gis) b)environmental dna(edna) surveillance c) global positioning system(gps) d) unmanned aerial system (uas)

Apond, rich in various micro-organisms, dries up due to drought. how will the amoeba in the pond protect themselves from this unfavorable condition?