The pericytes used in these experiments were probably in which phase of the cell cycle

Interphase

The pericytes are in the interphase of the cell cycle. This is the phase of the cell cycle between each cell division and is the phase in which the cell obtains nutrients, grows, reads its DNA, and conducts other normal cell functions including the arrest of the growth of the pericytes that were treated so that they would not divide but continue to function normally.

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 offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.