Which belongs to the correct place

organ:
organ system:
tissue:

bones, bone marrow, human body, skeletal system,

How can you tell the difference between rough er from smooth er?

Nkentucky, intoxicating beverages (beer, whiskey, wine, etc.) are involved to some extent in approximately % of collisions fatal to pedestrians.

In "the pig," what is the main effect that the piglet initially has on kibuka?