Question

question 9 of 20 : select the best answer for the question. 9. plants exchange gas with the atmosphere. which statement accurately describes this process? a. plants release carbon dioxide and take in oxygen through the stomata in leaves. b. plants release oxygen and take in carbon dioxide through the xylem in leaves. c. plants release oxygen and take in carbon dioxide through the stomata in leaves. d. plants release carbon dioxide and take in oxygen through the xylem in leaves. mark for review (will be highlighted on the review page)

Explanation:

To solve this, we analyze each option:

• Option A: Plants do release CO₂ (respiration) but also release O₂ (photosynthesis); the main gas exchange for photosynthesis is taking in CO₂ and releasing O₂, so A is incorrect.
• Option B: Xylem is for water transport, not gas exchange. Stomata are for gas exchange, so B is incorrect.
• Option C: During photosynthesis, plants take in CO₂ and release O₂ through stomata (small openings in leaves for gas exchange). This matches the correct process.
• Option D: Xylem is not for gas exchange, and the gas exchange description is wrong (should be taking in CO₂ and releasing O₂ for photosynthesis, though respiration also occurs but the main gas exchange related to plant - atmosphere interaction for food production is photosynthesis - based). So D is incorrect.

Answer:

C. Plants release oxygen and take in carbon dioxide through the stomata in leaves.