Polymerase chain reaction (PCR) is a laboratory technique used to amplify DNA sequences. The method involves using short DNA sequences called primers to select the portion of the genome to be amplified.olymerase chain reaction (PCR) is a laboratory technique used to amplify DNA sequences. The method involves using short DNA sequences called primers to select the portion of the genome to be amplified.
The smallest possible size for anything in the universe is the Planck Length, which is 1.6 x10-35 m across.
neptune is the smallest of the four giant outer planets the diameter at its equator is about 30775 miles 49528 kilometers as measured at a level of the atmosphere where the pressure is 1 bar the pressure at sea level on earth