ocr: 5 o - VIKING AND: 2 LANDER EQUIPEMENTO c) Gas exchange experiment This experiment was devised to measure gases produced by a soil sample exposed to a humid atmosphere or treated with a nutnent solution. Samples of: soil were placed in two incubation chambers containing a nutrient media of amino acids, minerals, vitamins, and various organic compounds (in particular nitrogenous bases that enable the nucleic acids in chromosomes to replicate genetic code). The atmosphere in the chambers was composed primarily of helium, with traces of carbon dioxide and krypton. The device looked for changes in ...
