Waec Model Questions Vol1 2017 Biology Question 15
Practice objective / multiple choice question 15 from the 2017 Waec Model Questions Vol1 Biology examination.
A desert shrub employs several adaptations to minimise water loss. Its leaves have a total surface area of 30 cm² and use Crassulacean Acid Metabolism (CAM) so that stomata are open only at night, giving an effective transpiration rate of 1 mL h⁻¹ cm⁻². A comparable C₃ plant has leaves with a total area of 50 cm² and a daytime transpiration rate of 5 mL h⁻¹ cm⁻². Assuming both plants experience 12 h of daylight, calculate the amount of water (in mL) saved per day by the desert shrub compared with the C₃ plant.
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This is Waec Model Questions Vol1 2017 Biology Question 15. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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