Biology
The root hairs are suited for absorbing water from the soil because:
- They have a large surface area
- They have a semi-permeable membrane
- They contain a solution of higher concentration than the surrounding water.
- All the three.
Transport in Plants
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Answer
All the three
Reason — Root hairs are long and thin so they can penetrate between soil particles and they have a large surface area for absorption of water which in return, increases the speed at which water and nutrients can be absorbed. The cell sap in the root hair cell is said to be of a high concentration as it contains more solutes compared to the surrounding soil water. This promotes water absorption.
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Related Questions
Force responsible for the ascent of sap is:
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- All the three
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- Rain water
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- the rise of water up to the stem of a plant.
- the elimination of water with dissolved water products.
- the loss of water as water vapour from the aerial parts of a plant.
- the loss of water as water vapour from the roots as well as the leaves of the plant.
Which one of the following favours the fastest transpiration rate?
- A cool, humid, windy day,
- A hot, humid, windy day,
- A hot, humid, still day,
- A hot, dry, windy day.