Gametes have a) homologous chromosomes b) twice the number of chromosomes found in body cells c) two sets of chromosomes d) one allele for each gene

D

Explanation:

Gametes, also called sex cells, are reproductive cells produced during meiosis for reproduction purposes. Gametes, due to their formation by meiosis, contains half the number of chromosomes as the organisms producing them.

Gregor Mendel, who established certain principles governing the passing of traits to offsprings called inheritance, performed experiments that illustrated that each gamete receives one form of a gene i.e. allele. Mendel discovered that each organism receives two forms of gene (allele) from each parent. These alleles (variant form of a gene) separate into gametes during meiosis in a way that each gamete has only one allele of a gene.

For example, a plant with genotype Tt (N.B: T and t are alleles of the gene coding for height) will undergo meiosis and its alleles T and t will separate into gametes in equal proportion I.e. one gamete will contain T allele while the other gamete, t allele.

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.