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Oxygen consumption by the skunk cabbage increases as temperature decreases. The

ID: 204398 • Letter: O

Question

Oxygen consumption by the skunk cabbage increases as temperature decreases. The rate of oxygen

consumption nearly doubles with every 10° drop in ambient temperature. Similarly, in the lotus flower, the

receptacle temperature is maintained between 30°C and 35°C for a two-day period during flower opening.

The ambient air temperature during this two-day period may fluctuate between 10°C and 30°C. Oxygen

consumption was observed to decrease during the day when temperatures were close to 30°C. Explain the

biochemical mechanism for these observations.

Explanation / Answer