Neco Model Questions Vol1 2021 Biology Question 2
Practice objective / multiple choice question 2 from the 2021 Neco Model Questions Vol1 Biology examination.
The leaf of a desert shrub differs from its ancestor in three ways: (i) leaf surface area is reduced by 30 %; (ii) stomatal density is reduced by 40 %; (iii) leaf thickness increases by 20 %, which reduces the diffusion of water vapour proportionally to the increase in thickness. If the ancestor loses water at a rate of 5 mg cm(^{-2}) h(^{-1}) under the same environmental conditions, estimate the water‑loss rate of the descendant leaf. State whether this rate is below the critical threshold of 2 mg cm(^{-2}) h(^{-1}) for survival.
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This is Neco Model Questions Vol1 2021 Biology Question 2. It is one of the objective questions from the 2021 Neco Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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