The genetic code contains 61 codons to specify the 20 common amino acids. many organisms carry fewer than 61 different trna genes in their genomes. these genomes take advantage of isoaccepting trnas and the rules governing third-base wobble to encode fewer than 61 trna genes. use these rules to calculate the minimal number of trna genes required to specify all 20 of the common amino acids.

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

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you can have just about every answer you can think of