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.
Humans have a hard time understanding the scale that is space so let's go over just how far away the closest object to Earth really is. The moon is on average approximately 235,000 miles (380,000 km) from Earth. Let's put that into perspective. Earth's Circumference at the Equator is 24,901.55 miles (40,075.16 km) so that means you would have to fly around the world almost 10 times to travel the same distance as the moon! Here we've got a video of going out on the streets to ask the public how far they think the moon is and see how close the average person is.