It's always a good idea to have positive and negative controls. In both types of control, you know what the correct results of the experiment should be. If you don't get the correct answers, then you know something went wrong with your experiment.<br />. <br />.
Leigh Nash. Leigh Bingham Nash (/liË nÃ¦Ê/; born June 27, 1976) is an American singer and songwriter who is the lead vocalist for the pop band Sixpence None the Richer and is also a member of Fauxliage and Movement Nashville. Her debut solo album, Blue on Blue, was released on August 15, 2006 by One Son/ Nettwerk record labels.
Thomas Earl Petty (October 20, 1950 â October 2, 2017) was an American singer-songwriter, multi-instrumentalist, record producer, and actor. He was the lead singer of Tom Petty and the Heartbreakers, formed in 1976. He previously led the band Mudcrutch. He was also a co-founder of the late 1980s supergroup the Traveling Wilburys.