DNA helps scientists to better classify organisms is because each organ has a specific kind of DNA. For an example, brains and hearts have many small types of RNA. So if a scientists see some RNA they know that its a heart or a brain.
It is were you tare a muscle in the body and it couses lots of pain
A: Melatonin
It's a hormone that controls sleep for the body.
False. Calisthenics are the substances in food that your body needs to carry out normal functions.
