Which effect occurs when C4 plant stomata close during midday sunlight?

💡 Explanation

When C4 plant stomata close during midday, the initial CO2 fixation by PEP carboxylase continues using stored four-carbon acids because it concentrates CO2 around Rubisco in bundle sheath cells, thus preventing photorespiration. Therefore photosynthesis continues, rather than higher photorespiration or drastic oxygen increases.

• Which risk increases for a migratory bird when feather barbules fail due to parasitic mite infestation?
• Which risk increases when flight feathers on a soaring bird lose barb interlocking function?
• Which risk increases when a hibernating mammal experiences interrupted torpor cycles due to external sound stimuli?
• Which effect primarily causes reduced avian efficiency during high-altitude migration?
• Which mechanism causes stunted eucalyptus growth when subjected repeatedly to high ozone environments?
• Which selection pressure affects cheetah hunting via pursuit?