Question

the lowest level of organization in an organ system is the group of

a. tissues that compose organelles.
b. cells that compose organelles.
c. organs that compose organ systems.
d. organelles that compose cells.

Explanation:

In the hierarchy of biological organization, organelles are parts of cells. Cells are the basic unit of life and are the lowest - level components that make up tissues, organs, and organ systems. Organelles are structures within cells. So the lowest level of organization in an organ system among the options is the organelles that compose cells.

Answer:

D. organelles that compose cells