In night, when photosynthesis is stopped, plants__________?
Correct answer: C. give off Carbon Dioxide
- A. take in Carbon Dioxide
- B. give off Oxygen
- C. give off Carbon Dioxide
- D. None of these
Explanation
Photosynthesis stops or greatly decreases in darkness, but respiration continues in plant cells. Respiration uses oxygen and releases carbon dioxide, so plants give off carbon dioxide at night.
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Environmental science covers ecosystems, food chains and webs, energy flow, biogeochemical cycles, biodiversity, natural resources and population effects. Atmospheric study includes the layers and composition of air, weather and climate, greenhouse gases, global warming, ozone depletion, acid rain and pollution, with climate change distinguished from ordinary weather variation.
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