Which of the following is a compensation point?
Correct answer: B. Photosynthesis and respiration occur at the same rate, resulting in no net exchange of gases between the atmosphere and plants
- A. Leaves respire utilizing O2 and releasing CO2
- B. Photosynthesis and respiration occur at the same rate, resulting in no net exchange of gases between the atmosphere and plants
- C. The rate of photosynthesis increases, resulting in a net release of oxygen and uptake of CO2
- D. The rate of respiration exceeds the rate of photosynthesis, resulting in a net release of carbon dioxide
Explanation
The compensation point is a specific condition in plant physiology where the rates of photosynthesis and respiration are equal. At this point, plants consume oxygen and carbon dioxide at the same rate they produce them, resulting in no net exchange of gases with the atmosphere. Option B correctly identifies this condition. Option A describes only respiration, Option C describes active photosynthesis with net oxygen release, and Option D describes a situation where respiration is dominant, all of which do not fit the definition of a compensation point.
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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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