When the concentrations of solutions are the same on both sides of a membrane, the two solutions are

not sure but try c two haploid cells

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

protistas excret ethanol used in the manufacture of vinegar