Describe the location of the kneecap to the knee joint

Name the organs of humanelemintary canal.

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?

These are groups of reproducing populations that are insulated from other groups