Neco Model Questions Vol1 2019 Biology Question 5

Practice objective / multiple choice question 5 from the 2019 Neco Model Questions Vol1 Biology examination.

Neco Model Questions Vol1 2019 Biology Objective / Multiple Choice Hard Difficulty
Question 5 NECO_MODEL_QUESTIONS_VOL1 • 2019 • BIOLOGY • objective

A desert plant reduces its stomatal density from \(300\ \text{stomata mm}^{-2}\) to \(150\ \text{stomata mm}^{-2}\) compared with a related mesic species. Each stomata transpires water at a rate of \(0.05\ \mu\text{mol H}_{2}\text{O s}^{-1}\) under the given conditions. If the leaf area is \(50\ \text{cm}^{2}\), determine:\n1) the reduction in total water loss (in mmol h\(^{-1}\)) due to the lower stomatal density alone;\n2) if the desert plant also increases leaf thickness, reducing the transpiration rate per stomata by 30 %, calculate the total water loss (in mmol h\(^{-1}\)) after both adaptations.

Answer Options

A. Reduction: 150,000 mmol h⁻¹; Total after both adaptations: 105,000 mmol h⁻¹
B. Reduction: 135,000 mmol h⁻¹; Total after both adaptations: 175,500 mmol h⁻¹
Correct Answer C. Reduction: 135,000 mmol h⁻¹; Total after both adaptations: 94,500 mmol h⁻¹
D. Reduction: 1,350 mmol h⁻¹; Total after both adaptations: 945 mmol h⁻¹
Correct Answer
C
Correct Option:
Reduction: 135,000 mmol h⁻¹; Total after both adaptations: 94,500 mmol h⁻¹

About This Question

This is Neco Model Questions Vol1 2019 Biology Question 5. It is one of the objective questions from the 2019 Neco Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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