The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night. Why? Plants usually open their stomata at night. O Carbon dioxide concentrations decrease at night. It is often too cold at night for these reactions to take place. At night, plants cannot produce the water needed for the Calvin cycle. The Calvin cycle depends on products of the light reactions.

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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The reactions of the Calvin cycle are not directly dependent on light, but
they usually do not occur at night. Why?
Plants usually open their stomata at night.
Carbon dioxide concentrations decrease at night.
It is often too cold at night for these reactions to take place.
At night, plants cannot produce the water needed for the Calvin cycle.
The Calvin cycle depends on products of the light reactions.
Transcribed Image Text:The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night. Why? Plants usually open their stomata at night. Carbon dioxide concentrations decrease at night. It is often too cold at night for these reactions to take place. At night, plants cannot produce the water needed for the Calvin cycle. The Calvin cycle depends on products of the light reactions.
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