Which sequence best represents the different levels of organization of multicellular organisms from least complex to most complex?
A. cell ⇒ organ ⇒ tissue ⇒ organ system ⇒ organism
B. cell ⇒ tissue ⇒ organ ⇒ organ system ⇒ organism
C. organism ⇒ organ system ⇒ organ ⇒ tissue ⇒ cell
D. organism ⇒ organ ⇒ organ system ⇒ tissue ⇒ cell
The answer is B, because cells make up tissue, tissue makes up organs, organs make up the organ system, and an organ system makes up an organism. Imagine it as a process from least to greatest complexity.
