code: def is_biological_process(self, go_term):
          
          bp_root = "GO:0008150"
          if go_term == bp_root:
              return True
          ancestors = self.get_isa_closure(go_term)
          if bp_root in ancestors:
              return True
          else:
              return False
docs: Returns True is go_term has is_a, part_of ancestor of biological process GO:0008150