Neco Model Questions Vol1 2021 Biology Question 5

Practice essay / theory question 5 from the 2021 Neco Model Questions Vol1 Biology examination. This question covers Plant transport (xylem and phloem), Human circulatory system, Transpiration and environmental factors .

Neco Model Questions Vol1 2021 Biology Essay / Theory
Topics: Plant transport (xylem and phloem) Human circulatory system Transpiration and environmental factors
Question 5 NECO_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • essay

Transport processes are essential for the survival of both plants and animals. Answer the following questions, giving clear, concise explanations and using appropriate biological terminology.

Question Parts

( a )
Describe the complete pathway that water follows from the soil to the leaf blade in a typical dicotyledonous plant. In your answer, identify the major tissues involved and explain the physical forces that drive the movement of water at each stage.
( b )
Compare the mechanisms by which nutrients are transported in the phloem of a plant with the way oxygen is transported in human blood. Highlight the driving forces, the role of carrier molecules or proteins, and how concentration gradients are maintained in each system.
( c )
A student measures the rate of transpiration from a leaf at three different relative humidity levels: 30 %, 60 % and 90 %. Explain how increasing humidity influences the rate of transpiration and discuss the physiological basis for this effect.

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About This Question

This is Neco Model Questions Vol1 2021 Biology Question 5. It is one of the essay questions from the 2021 Neco Model Questions Vol1 Biology examination.

The question covers Plant transport (xylem and phloem), Human circulatory system, Transpiration and environmental factors .

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