Question 1
Supplement (what this means)
Supplement: only for the Extended papers (2 and 4). Core students can skip it. What the labels meanWhy do root hair cells have long extensions?
- to increase the surface area for absorption
- to store water
- to carry out photosynthesis
- to transport sucrose
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Answer: A (1)
Question 2
State two functions of root hair cells and explain how the root hair is adapted to carry them out.
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- absorb water (1)
- absorb mineral ions (1)
- long extension / root hair gives a large surface area (1)
Question 3
Outline the pathway taken by water from the soil to the mesophyll cells of a leaf.
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- enters root hair cells (from soil) (1)
- moves through root cortex cells (1)
- enters and moves up the xylem (1)
- (from xylem in the leaf) to mesophyll cells (1)
Question 4
Which list shows the pathway of water through a plant in the correct order?
- xylem, root hair cell, root cortex, mesophyll
- root hair cell, root cortex, xylem, mesophyll
- root cortex, root hair cell, mesophyll, xylem
- mesophyll, xylem, root cortex, root hair cell
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Answer: B (1)