What happens during respiration in plants?

• A. When plants absorb oxygen and release carbon dioxide, water and energy
• B. When plants absorb carbon dioxide and release oxygen
• C. When plants convert sugar into chlorophyll
• D. When roots absorb water from soil

Answer: (A)

Respiration in plants is the process by which plant cells release stored energy by breaking down sugars using oxygen. During this process, oxygen is taken in and carbon dioxide and water are released as waste products, with energy captured as ATP to power cellular activities. This gas exchange and energy production happen mainly in mitochondria and underpin activities like growth and maintenance. This is why the description focusing on oxygen intake with release of carbon dioxide, water, and energy fits respiration. The other options refer to photosynthesis or unrelated steps, such as absorbing water or making chlorophyll, which are not respiration.