People living in equatorial countries have a darker skin tone than others. what would be the reason for this change in skin tone?

At the complete end of cellular respiration, how many molecules of atp are produced?               a.  15    b.  26    c.  38    d.  34 

Any sound above what db can cause hearing loss in human beings

When a cell is in a solution that has the same concentration of water and solutes as its cytoplasm, the cell is said to be in a(n) solution. a. isotonic b. hypotonic c. hypertonic b. facilitated