During nighttime when photosynthesis ceases, plants undergo__________?
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Answer: C. give off Carbon Dioxide
Explanation
Without sunlight, plants cannot drive the light-dependent reactions required for active photosynthesis. Consequently, plants rely entirely on cellular respiration during the dark hours of the night. Cellular respiration consumes oxygen and releases carbon dioxide as a standard metabolic byproduct. Photosynthesis allows green plants to convert solar energy into chemical energy stored in glucose. Cellular respiration breaks down stored sugars to release usable energy for plant cellular maintenance. During daytime, net oxygen release from photosynthesis usually outweighs the carbon dioxide released by respiration.
Understanding plant gas exchange is important for managing indoor botanical environments and greenhouses. Global plant respiration cycles help regulate atmospheric carbon dioxide levels on a seasonal basis. All aerobic organisms depend on balanced gas exchange cycles occurring within global ecosystems. Plants do not take in carbon dioxide at night because photosynthesis is inactive without sunlight. Giving off oxygen is a daytime process driven by photosynthetic activity in green plant tissues. Option none of these is incorrect because plants clearly give off carbon dioxide at night.
- Subject
- Everyday Science
- Category
- Everyday Science
- Topic
- —
- Difficulty
- medium
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