Waec Model Questions Vol1 2017 Biology Question 43
Practice objective / multiple choice question 43 from the 2017 Waec Model Questions Vol1 Biology examination.
A xerophytic plant initially has a leaf area of 100 cm² and a stomatal density of 200 stomata cm⁻². Its transpiration rate is directly proportional to the product of leaf area and stomatal density. During a drought the leaf area decreases by 30 % and stomatal density decreases by 20 %. However, the plant's root growth increases water‑uptake capacity, effectively increasing the functional stomatal opening by 10 % relative to the reduced density. What is the percentage decrease in the plant's transpiration rate compared with the original rate?
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About This Question
This is Waec Model Questions Vol1 2017 Biology Question 43. It is one of the objective questions from the 2017 Waec Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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