Neco 2021 Biology Question 12

Practice objective / multiple choice question 12 from the 2021 Neco Biology examination.

Neco 2021 Biology Objective / Multiple Choice Hard Difficulty
Question 12 NECO • 2021 • BIOLOGY • objective

As described, a leaf diagram shows a cuticle thickness of \(5\,\mu\text{m}\), a palisade mesophyll thickness of \(30\,\mu\text{m}\) and a spongy mesophyll thickness of \(45\,\mu\text{m}\). The leaf area is \(2\ \text{cm}^2\). Assuming the thicknesses are uniform across the leaf, (a) calculate the total volume of mesophyll tissue (palisade + spongy) in cubic micrometres, and (b) indicate which mesophyll layer contributes more to gas exchange.

Answer Options

Correct Answer A. Total mesophyll volume = 1.5×10^{10} µm³ (or 15 mm³); spongy mesophyll contributes more to gas exchange
B. Total mesophyll volume = 1.5×10^{9} µm³ (or 1.5 mm³); spongy mesophyll contributes more to gas exchange
C. Total mesophyll volume = 2.0×10^{10} µm³ (or 20 mm³); palisade mesophyll contributes more to gas exchange
D. Total mesophyll volume = 1.35×10^{10} µm³ (or 13.5 mm³); palisade mesophyll contributes more to gas exchange
Correct Answer
A
Correct Option:
Total mesophyll volume = 1.5×10^{10} µm³ (or 15 mm³); spongy mesophyll contributes more to gas exchange

About This Question

This is Neco 2021 Biology Question 12. It is one of the objective questions from the 2021 Neco Biology examination.

Difficulty level: Hard .

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