Which of the following is NOT a mechanism to circumvent the limits imposed by diffusion?
A)placing metabolically active cells in the interior of an organism and metabolically inert structures along the exterior surface
B)using vascular tissue to transport materials throughout the plant body
C)placing metabolically active cells along a series of canals and pores
D)using a circulatory system to distribute materials throughout the animal body
E)All of these choices are correct.

Question

Quizplus · Accepted Answer

Placing metabolically active cells in the interior of an organism and metabolically inert structures along the exterior surface does not directly circumvent the limits of diffusion. While it may help to optimize diffusion in certain situations, it is not a mechanism to circumvent the limits of diffusion. The other options listed (B, C, and D) all involve some sort of specialized transportation system to move materials throughout the organism, which bypasses the need for diffusion to occur over long distances.

Which of the Following Is NOT a Mechanism to Circumvent