Which of the following statements is not true?

a. Chemical treatment of sediment can be effective in reducing pollution problems, but it must be repeated every few years
b. Fast-flowing streams are generally better aerated than are lakes
c. An oxygen sag curve describes changes in a stream's dissolved oxygen content along its length below an organic-matter source
d. A body of water is described as "dead" when it contains fatal concentrations of toxic chemicals

When in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? view available hint(s)when in solution, a molecule that moves slowly across an artificial membrane moves rapidly across a plasma membrane. this molecule rapidly enters the cell regardless of whether its concentration is higher inside or outside the cell. using this information, which transport mechanism is most likely to be responsible for the movement of the molecule across a plasma membrane? active transportexocytosis