A dolphin is living in a closed system consisting of a large aquarium, the dolphin, and its food. Which method could be used to demonstrate the Law of Conservation of Energy

The answer would be sand and gravel

The salt in the sea water dehydrated the sailor because her body could not take in the amount to salt in the sea water

The main role of dna in the  cell is the long-term storage of information. it is often compared to a blueprint, since it contains the instructions to construct other components of the  cell, such as  proteins  and rna molecules.the main function of rna is to carry information of amino acid sequence from the genes to where  proteins  are assembled on  ribosomes  in the  cytoplasm. mark brainliest, my work is good.