Question

both photosynthesis and cellular respiration are part of the carbon cycle. which statement processes?
both release carbon dioxide as waste.
both provide organisms with usable energy.
both add bacteria to the soil.
both require fixation in order to convert molecules.

Explanation:

• Analyze Option 1: Photosynthesis absorbs $\ce{CO_2}$, while cellular respiration releases $\ce{CO_2}$. So this is incorrect.
• Analyze Option 2: Photosynthesis converts light energy into chemical energy (stored in glucose), and cellular respiration breaks down glucose to release ATP (usable energy) for organisms. Both processes are involved in providing usable energy (either storing or releasing it for use).
• Analyze Option 3: Neither photosynthesis nor cellular respiration directly add bacteria to the soil. This is irrelevant to both processes.
• Analyze Option 4: Photosynthesis involves carbon fixation (converting inorganic $\ce{CO_2}$ to organic compounds), but cellular respiration does not require fixation (it breaks down organic compounds). So this is incorrect.

Answer:

B. Both provide organisms with usable energy.