Gce Model Questions Vol1 2017 Biology Question 5

Practice essay / theory question 5 from the 2017 Gce Model Questions Vol1 Biology examination. This question covers Transport .

Gce Model Questions Vol1 2017 Biology Essay / Theory

Topic: Transport

Question 5 GCE_MODEL_QUESTIONS_VOL1 • 2017 • BIOLOGY • essay

A mature dicotyledonous plant leaf exhibits several structural adaptations that facilitate the efficient transport of water and dissolved nutrients from the roots to the photosynthetic tissues. Using this context, answer the following.

Question Parts

( a )

Describe the complete pathway that water follows from the soil to the leaf mesophyll, indicating the role of root hairs, xylem vessels, and the transpiration pull.

( b )

Explain how stomatal regulation balances water loss with CO₂ uptake, and discuss the effect of this balance on photosynthetic efficiency during a period of drought.

( c )

Compare the mechanisms by which sugars are transported in the phloem with the transport of water in the xylem, focusing on the direction of flow, energy requirements and the driving forces involved.

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About This Question

This is Gce Model Questions Vol1 2017 Biology Question 5. It is one of the essay questions from the 2017 Gce Model Questions Vol1 Biology examination.

The question covers Transport .

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