Select all of the following in which carbon fixation still occurs during hot, dry weather.Group of answer choicesCAM photosynthesisC3 photosynthesisC4 photosynthesis
Question
Select all of the following in which carbon fixation still occurs during hot, dry weather.Group of answer choicesCAM photosynthesisC3 photosynthesisC4 photosynthesis
Solution
Carbon fixation still occurs during hot, dry weather in:
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CAM photosynthesis: This is a type of photosynthesis used by desert and succulent plants. These plants open their stomata at night to minimize water loss and take in CO2. The CO2 is stored as a four-carbon acid, and during the day, the CO2 is released for use in the Calvin cycle.
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C4 photosynthesis: This is another type of photosynthesis used by plants in hot, dry environments. These plants have a unique leaf anatomy that physically separates the light-dependent and light-independent reactions of photosynthesis, which helps to minimize photorespiration and water loss.
C3 photosynthesis, on the other hand, is not as efficient under hot, dry conditions. These plants do not have any special adaptations to deal with these conditions, and as a result, they tend to close their stomata to prevent water loss. This also prevents CO2 from entering the leaf, which can lead to a decrease in photosynthesis and carbon fixation.
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