How do the various clades in a biological organization differ from each other? A. They are distinguished by the shared traits of the organisms they include.

B. They are distinguished by the geographic distribution of the species they include.

C. They are distinguished by the genetic complexity of the organisms they include.

D. They are distinguished by the population sizes of the species they include.

i believe the answer is a or 1

the backbone of the dna and rna compound is sugar phosphate.

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.