Photosynthesis carried out by terrestrial plants is _________ of total photosynthesis?
Correct answer: C. 10%
- A. 1-2%
- B. 5%
- C. 10%
- D. 20%
Explanation
Terrestrial plants contribute about 10% of the total global photosynthesis, while aquatic organisms in oceans, lakes, and ponds perform most of the remainder. Students may choose 20% by overestimating the contribution of forests and crops compared with the vast photosynthetic area of aquatic organisms.
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About Cellular Respiration
Cellular respiration releases energy from glucose through glycolysis, the link reaction, the Krebs cycle and the electron transport chain, producing ATP. The pathway differs in oxygen availability: aerobic respiration uses oxygen and yields more ATP, while anaerobic respiration produces much less ATP and forms lactic acid in muscles or ethanol and carbon dioxide in yeast.
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