Question

multiple-choice question
what do cellular respiration and the burning of fossil fuels have in common?

they both consume carbon dioxide

they both release carbon dioxide

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Explanation:

• For the option "they both consume carbon dioxide": Cellular respiration consumes glucose and oxygen, releasing carbon dioxide. Burning fossil fuels (like coal, oil) also involves reacting with oxygen and releasing carbon dioxide. So they don't consume carbon dioxide.
• For the option "they both release carbon dioxide": In cellular respiration, the chemical reaction is \( C_6H_{12}O_6 + 6O_2

ightarrow 6CO_2 + 6H_2O + \text{energy} \), which releases \( CO_2 \). Burning fossil fuels (e.g., \( \text{Fuel (hydrocarbon)} + O_2
ightarrow CO_2 + H_2O + \text{energy} \)) also releases \( CO_2 \). So this option is correct.

Answer:

B. they both release carbon dioxide (assuming the second option is labeled B; if the original had different labels, adjust accordingly, but based on the content, the correct choice is the one stating they both release carbon dioxide)