How can pollution affect the level of oxygen in water? Why is this
important?

oxygen is necessary for good water quality. As dissolved oxygen levels in water drop below 5.0 mg/l, aquatic life is put under stress. The lower the concentration, the greater the stress

answer; i do believe that the correct answer is; ///mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis;

2%? i tried finding the exact sorry if it's not 100% correct ; -;