Cocaine and crack produce a euphoric rush by: blocking the actions of serotonin. depressing neural activity in the brain. blocking the reuptake of dopamine in brain cells. stimulating the brain's production of endorphins. preventing the body from producing endorphins.

i would say the prokaryotic cells the prokaryotic cells are less complex, are usually found only in unicellular organisms and have more limited capabilities than eukaryotic cells.

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.