Gce Model Questions Vol1 2021 Biology Question 30
Practice objective / multiple choice question 30 from the 2021 Gce Model Questions Vol1 Biology examination.
Two desert plant species differ in leaf adaptations. Species A has a stomatal density of 150 stomata mm\(^{-2}\) and a cuticle thickness of 5 µm. Species B has a stomatal density of 80 stomata mm\(^{-2}\) and a cuticle thickness of 12 µm. Each stomatal pore is approximated as a circular opening of radius 10 µm. Assuming water‑vapour flux \(J\) is proportional to \(\dfrac{\text{total pore area per leaf area}}{\text{cuticle thickness}}\), determine which species loses less water per unit leaf area and by what factor the fluxes differ.
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This is Gce Model Questions Vol1 2021 Biology Question 30. It is one of the objective questions from the 2021 Gce Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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