To determine the mistake Mitchell made in his diagram regarding the levels of organization within a multicellular organism, we must consider the correct order:
- Cells
- Tissues
- Organs
- Organ Systems
- Organisms
Now, let's evaluate the options:
A. Mitchell did not correctly describe tissues.
- This could be correct if he misrepresented what tissues are, but we need more context.
B. Mitchell reversed the order of tissues and organs.
- This could be true if he depicted tissues as being larger or more complex than organs, which is incorrect.
C. Mitchell did not correctly describe organ systems.
- Similar to option A, this depends on how he described organ systems.
D. Mitchell reversed the order of organ systems and organisms.
- This is incorrect as organ systems are always smaller than organisms.
Based on the standard hierarchy, the most likely mistake Mitchell made in his diagram is option B: Mitchell reversed the order of tissues and organs.