Gce Model Questions Vol1 2022 Biology Question 8

Practice objective / multiple choice question 8 from the 2022 Gce Model Questions Vol1 Biology examination.

Gce Model Questions Vol1 2022 Biology Objective / Multiple Choice Hard Difficulty
Question 8 GCE_MODEL_QUESTIONS_VOL1 • 2022 • BIOLOGY • objective

A desert shrub has a leaf‑area index (LAI) of 0.5. Under normal conditions its stomatal conductance is \(g_s = 0.05\) mol m⁻² s⁻¹ and the ambient vapor‑pressure deficit (VPD) is 2 kPa. Total transpiration per ground area is given by \(E_{tot}=g_s\times\text{VPD}\times\text{LAI}\). The plant can tolerate a maximum total water loss of 0.03 mol m⁻² s⁻¹. Determine the maximum proportion \(f\) by which the plant can reduce its stomatal conductance (i.e., \(g_{s,new}=f\,g_s\)) without exceeding the tolerated water loss.

Answer Options

Correct Answer A. f ≤ 0.6 (i.e., conductance must be reduced to 60 % of the original)
B. f ≤ 0.5 (i.e., conductance must be reduced to 50 % of the original)
C. f ≤ 0.7 (i.e., conductance must be reduced to 70 % of the original)
D. f ≤ 0.4 (i.e., conductance must be reduced to 40 % of the original)
Correct Answer
A
Correct Option:
f ≤ 0.6 (i.e., conductance must be reduced to 60 % of the original)

About This Question

This is Gce Model Questions Vol1 2022 Biology Question 8. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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