The Lowest Level of Biological Organization That Can Perform All

The lowest level of biological organization that can perform all the activities required for life is the

A) organelle-for example, a chloroplast.
B) cell-for example, a skin cell.
C) tissue-for example, nervous tissue.
D) organ system-for example, the reproductive system.
E) organism-for example, an amoeba, dog, human, or maple tree.