Why are excessive concentrations of phosphorus sometimes considered a pollutant

Many state and local authorities are making laws regarding recreation on lakes, rivers, and oceans to reduce water pollution. why would lawmakers need to consult with scientists before making these laws? a) to make scientists feel important b) so that the laws reduce pollution by a sufficient amount c) so that parks and lakefront facilities will still make large profits d) so that the public will believe that the laws are important to follow

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?

Moving down the ramp from 6 meters to