QUESTION: answer this: when was the last solar eclipse seen in north america??

ANS: August 21, 2017

QUESTION: answer this: when did the first galaxy note come out??

ANS: October29, 2011

QUESTION: answer this: what chemical changes in histone proteins are responsible for changes in gene expression??

ANS: Acetylation

QUESTION: answer this: who took the picture of the windows xp background??

ANS:
Charles O'Rear