An instrument used to record the electrical impulses of the brain is called an:

Ibelieve that the instrument used to record the electrical impulses of the brain is called the electroencephalograph.  an electroencephalograph is used for recording electrical brain activity a process known as electroencephalography which is an electrophysiological monitoring method to record electrical activity. it involves placing electrodes on the scalp, may be used to diagnose tumors of the brain, to study brain waves among other conditions. 

Fossils are the preserved remains or traces of animals, plants, and other organisms from the past. Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today.