In horses, black hair color is dominant to chestnut hair color.
If the black horse is homozygous, what is its genotype?
BB
Bb
bb

BB

Explanation:

If black is the dominate trait and its homozygous, the it would be the same size letters, hence BB

BB

Explanation:

The capital "B" represents the dominant allele while the lowercase "b" represents the recessive trait. When a genotype is homozygous, that means that both letters in genotype are capital or both are lowercase.

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.