Hey just some advice for future title posting, please make it a little shorter because it just looks bad with such a long title. Maybe make the title say "Two Questions", and then explain your questions in your post.
I think the chicken came first because I'm just kind of guessing.
Also, I think that the tree would still make a noise, but no one would ever know because nobodys there to hear it.
1: = chickes occured through mutation. the most likely form of mutation is genetic. this occures most often in young... aka the egg.
2: = energy cannot be ceated or destroyed therefor if the tree fell over without makeing a sound, it would either glow, catch on fire or become radioactive. aka yes
The chicken came first. Common sense. But, I say the egg! But, how will the egg hatch if there is no chicken sitting on it? But the egg can survive, I think, but again how will egg or chicken increase population, so I say the chicken, but my final answer is I don't know. :P
P.S. Chicken!
And the tree does make a noise, and it should, but no one can hear it, depends though.