Plants are a source of what major biochemical?

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.

her next move would be to use agarose gel electrophoresis to separate the dna molecules of varying length and create a dna fingerprint.