Question

Multiple Choice Question
The lowest level of organization in an organism is
A.
an organ because organs work together in organ systems.

B.
a tissue because tissues compose larger units such as organs.

C.
an organ system because organ systems engage in critical functions.

D.
a cell because cells are the independent units that make up the whole.

Answer 1

The correct answer is:

**D. a cell because cells are the independent units that make up the whole.**

Cells are considered the basic unit of life and the lowest level of organization in an organism.