How Do Sponges Transport Nutrients Within Their Bodies

Multiple Choice

How do sponges transport nutrients within their bodies?

A) They have simple digestive and circulatory systems composed of spongin.
B) They rely on diffusion to move nutrients between their cells.
C) Their mobile amoebocytes transport food molecules from cell to cell.
D) They are not able to transport nutrients within their bodies but must independently absorb all necessary nutrients from the surrounding water.