I believe the answer you are looking for is median.
example:
2 4 6 |8| 10 12 14
median: 8
three on each side of "8"
A synonym for observation could be remark.
No they are the same species just different breed, think of it like humans. does being light skin make you a different species? no
The product is released from the active site of the enzyme during a chemical reaction.