1.

The diagram shows a simplified nephron.                      In which regions (marked as 1,2,3,4 and 5) would cells with many microvilli and mitochondria be found?

A. 1 and 5         
B.                    2 and 4
C. 2 and 3         
D.                    3 and 4
Answer» D.                    3 and 4


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