The middle primary brain vesicle, the mesencephalon, gives rise to which adult brain structure?
a. diencephalon
b. midbrain
c. cerebrum
d. medulla oblongata

What occupation did muhammad have before the first revelation

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

Why do we perceive objects as retaining their brightness under different lighting levels?