The wood in most of our basses was once alive, somewhat like the aforementioned bone. The plastic, by a slight stretch, was once dinosaurs. BFD.
And I would not suggest offing a whale for a bass, but if I came across a beached whale bone large enough to harvest as a neck or w/e, I'd bring it home & PM the OP. EIEIO
Actually most petroleum is from the Carboniferous Period, before the dinosaurs. And most of it's probably from plant matter.
Just saying.