5. Which is not a characteristic of stem cells?
a) Can develop into all cell types after they become specialized
b) Divide and renew for long periods of time
c) Remain undifferentiated in form for long periods of time
d) Can develop into specialized cell types

Dr. arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode. it measures the volume of the sound that occurs at the minimum pressure at which the explosion will occur. it then increases the pressure and measures the volume of the explosions that occur. what kind of investigation is the scientist conducting?