Neurofibromatosis, a genetic disease caused by mutation on the nf1 gene, follows an autosomal dominant pattern of inheritance. the diagram shows that the father carries two copies of the defective gene and the mother is unaffected. what percentage of offspring will have neurofibromatosis? affected: rr normal: rr a: 0% b: 25% c: 50% d: 100%

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.

the answer is b. glad to .