Question:
The most widely accepted theory for ascent of sap in trees is:
The most widely accepted theory for ascent of sap in trees is:
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Transpiration pull creates tension.
Cohesion between water molecules maintains continuity.
This is the most accepted theory.
Cohesion between water molecules maintains continuity.
This is the most accepted theory.
Updated On: Aug 12, 2026
- Capillarity
- Role of atmospheric pressure
- Pulsating action of living cell
- Transpiration pull and cohesion theory of Dixon and Jolly
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept:
Ascent of sap is the upward movement of water and minerals in plants.
Several theories have been proposed to explain this phenomenon.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the different theories of ascent of sap.
Step 3: Detailed Explanation:
The most widely accepted theory is the transpiration pull and cohesion theory.
It was proposed by Dixon and Jolly.
This theory states that water moves upward due to transpiration pull.
Cohesion between water molecules maintains a continuous column.
Capillarity, atmospheric pressure, and pulsating action theories are not widely accepted.
Step 4: Final Answer:
The most widely accepted theory is the transpiration pull and cohesion theory of Dixon and Jolly.
Hence, the correct option is (D).
Ascent of sap is the upward movement of water and minerals in plants.
Several theories have been proposed to explain this phenomenon.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the different theories of ascent of sap.
Step 3: Detailed Explanation:
The most widely accepted theory is the transpiration pull and cohesion theory.
It was proposed by Dixon and Jolly.
This theory states that water moves upward due to transpiration pull.
Cohesion between water molecules maintains a continuous column.
Capillarity, atmospheric pressure, and pulsating action theories are not widely accepted.
Step 4: Final Answer:
The most widely accepted theory is the transpiration pull and cohesion theory of Dixon and Jolly.
Hence, the correct option is (D).
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