<span>the molecule that carries the instruction for producing mRNA is DNA</span>
Answer: [D]: "oceans" .
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Note: Among the answer choices given—{aquifers, glaciers, lakes, oceans}—oceans are the saltiest (VERY salty—requiring "desalination" in order to obtain potable water.
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Volcanoes on mars kinda look like craters on earth. They look like mounds, its hard to explain.
-TheOneandOnly003