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← Nature & AnimalsWhich outcome occurs when terrestrial plants close their stomata during periods of high temperature and low humidity?
A)Photosynthetic rate declines sharply✓
B)Transpiration rate increases extensively
C)Internal CO2 concentration rises
D)Root water uptake increases rapidly
💡 Explanation
When stomata close, CO2 intake decreases because the primary pathway is blocked, limiting the carbon fixation cycle of photosythesis, causing a sharp decline. Therefore photosynthetic rate declines rather than transpiration increasing or internal CO2 rising, which require open stomata and abundant water availability
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