Question

How does photosynthesis help to maintain the percentage of oxygen and carbon dioxide in the atmosphere?

• A. By giving off carbon dioxide and absorbing oxygen
• B. By giving off oxygen and absorbing carbon dioxide
• C. By releasing oxygen and carbon dioxide
• D. By absorbing oxygen and carbon dioxide.

Answer 1

The correct option is B By giving off oxygen and absorbing carbon dioxide

During photosynthesis, carbon dioxide is fixed to form carbohydrate by the dark reaction. The water molecules are broken down during the light reaction and release oxygen. Thus, the two process helps to maintain the balance of oxygen and carbon dioxide in the atmosphere.

So, the correct answer is option B.