About _% of photosynthesis is carried out by terrestrial plants, while the rest occurs in oceans, lakes, and ponds.
Correct answer: A. 10%
- A. 10%
- B. 20%
- C. 30%
- D. 40%
Explanation
The correct answer is 10%. Terrestrial plants, such as trees, grasses, and other land-based vegetation, contribute to about 10% of the total photosynthesis on Earth. This process involves capturing sunlight and converting it into chemical energy. However, the majority of photosynthesis occurs in aquatic environments, primarily by phytoplankton in oceans, lakes, and ponds, which account for the remaining 90%. The other options (20%, 30%, and 40%) are incorrect, as they overestimate the contribution of terrestrial plants.
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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