But specifically, what part of biological evolution disobeys the 2nd Law of Thermodynamics. In other words, what part of evolution, if correct, requires the entropy of a biological system(s) to decrease more than the increase in entropy of its surroundings?
Or are you saying that evolution doesn't specifically violate the 2nd Law of Thermodynamics?
The part that insists that specified complexity can derive from random chaos unguided by a priori information.
The Neo Darwinist's concept of information gained by the organism along the way and operating on random change informed by survivability has the problem of explaining where the organism's specified original information came from in the first place.
Entropy is a measure of disorder (i.e. decay). Disorder is the natural direction of the universe sans information and energy.