Over 90% of union contracts in the private sector specify that employees can be discipline and discharged for just cause only.

If the mitochondrion is the result of endosymbiosis, which membrane of the mitochondrion represents the engulfing vesicle?

A) the outer mitochondrial membrane
B) the vacuole membrane
C) the nuclear membrane
D) the thylakoid membrane
E) the inner mitochondrial membrane