Question

8.
glucose
c₆h₁₂o₆
oxygen
o₂
carbon
dioxide
co₂
this student model of cellular respiration is
incomplete. however, one thing it does show well is __
○ this model shows all of these well.
○ that molecules are broken down and rearranged.
○ that energy is released.
○ that matter is conserved.

Explanation:

1. Analyze the first option: The model is incomplete (e.g., it doesn't show all products like water or energy aspects fully), so "shows all" is wrong.
2. Analyze the second option: The model shows glucose (C₆H₁₂O₆) and O₂ as reactants, and CO₂ as a product. Visually, the atoms (black for C, red for O) in glucose and O₂ are rearranged to form CO₂. This shows molecules (glucose and O₂) being broken down (or their atoms rearranged) to form new molecules (CO₂), so this option fits.
3. Analyze the third option: The model has no representation of energy (like arrows for energy release or symbols), so it doesn't show energy is released.
4. Analyze the fourth option: To show matter is conserved, we need to see the same number of each atom on both sides. The model only shows part of the reaction (missing H and maybe full product side like H₂O). So it doesn't clearly show matter conservation (as we can't verify atom counts from the given model alone), while the rearrangement of molecules (atoms in molecules) is visible.

Answer:

that molecules are broken down and rearranged.