Water enters a plant through root hair cells - Edexcel - GCSE Biology - Question 5 - 2019 - Paper 1
Question 5
Water enters a plant through root hair cells.
Root hair cells have:
A a small surface area and thin cell walls
B a small surface area and thick cell walls
C a large... show full transcript
Worked Solution & Example Answer:Water enters a plant through root hair cells - Edexcel - GCSE Biology - Question 5 - 2019 - Paper 1
Step 1
Water enters a plant through root hair cells. Root hair cells have:
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Answer
The correct answer is C: a large surface area and thin cell walls. This characteristic of root hair cells enhances the absorption of water and nutrients from the soil.
Step 2
Explain how water in the root is transported to the leaves of the plant.
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Answer
Water is transported from the roots to the leaves primarily through the process of osmosis. Water enters the root hair cells through osmosis due to higher solute concentration inside the cells compared to the surrounding soil. This water then moves into the xylem vessels, which transport it upwards to the leaves. Additionally, water is lost through transpiration from the leaves, creating a negative pressure that helps draw more water from the roots.
Step 3
How is sucrose transported from the leaves to other parts of the plant?
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Answer
Sucrose is transported from the leaves to other parts of the plant by C: by translocation through the phloem. This process enables the distribution of energy-rich compounds throughout the plant.
