Question

Which of the following is the smallest level of organization in living things?

A. organ system
B. cell
C. tissue
D. organ

Answer 1

Cell

Cells make tissue, tissues makes organs, organs make a system.

Answer 2

B. Cell

Step-by-step explanation:

Order from smallest to most complex:

Cell - Tissue - Organ - Organ system.

Cells are the smallest. Multiple cells working together forms a tissue. Multiple tissues working together forms and organ. Multiple organs form an organ system.