Neco 2018 Biology Question 6
Practice objective / multiple choice question 6 from the 2018 Neco Biology examination.
The diagram shows a cross‑section of a typical dicot leaf. The xylem is located 0.4 cm below the upper epidermis and the phloem is 0.2 cm below the xylem. The total stomatal opening area on the lower epidermis is 0.03 cm². The hydraulic conductivity of the xylem tissue is 0.8 cm·MPa⁻¹·s⁻¹ and the effective cross‑sectional area for water transport in the xylem is 0.05 cm². Soil water potential is -0.2 MPa while leaf water potential is -0.9 MPa. Assuming the distance from the soil water source to the leaf is 30 cm, calculate the volumetric flow rate of water through the xylem (in cm³·s⁻¹) using the relation \( \dfrac{K \; A \; \Delta\Psi}{L} \).
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About This Question
This is Neco 2018 Biology Question 6. It is one of the objective questions from the 2018 Neco Biology examination.
Difficulty level: Medium .
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