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.
Because they know how fast a laser beam travels, they can calculate the distance within centimeters. They found that when the moon is closest to earth it is 363,104 km (225632 mi) away. When it is at it's furthest point away it is 405,696 km (252,099 mi) away. The average distance away is 384,393 km (238,854 mi) away.