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Questions and Answers
What is the primary region of water uptake in roots?
What is the primary region of water uptake in roots?
- Root cap
- Root hairs
- Root tip (correct)
- Root apex
How far can the region of active water uptake extend down the root?
How far can the region of active water uptake extend down the root?
- 2 cm
- 15 cm
- 5 cm
- 10 cm (correct)
At what distance from the tip does the region of active water uptake typically start?
At what distance from the tip does the region of active water uptake typically start?
- 1 cm
- 0.1 cm
- 2 cm
- 0.5 cm (correct)
What factor does not affect the permeability of roots to water?
What factor does not affect the permeability of roots to water?
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Which of the following is a characteristic of the permeability of roots to water?
Which of the following is a characteristic of the permeability of roots to water?
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Study Notes
Root Permeability to Water
- The region of most active water uptake in roots is near the root tip.
- Permeability of roots to water varies widely with factors such as age, physiological conditions, and the water status of the plant.
- In young roots, the region most active for water uptake starts about 0.5 cm from the tip.
- This active region can extend down the root as far as 10 cm.
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