Pulsatory force theory' of ascent of sap was given by

Options

A. Molisch
B. J.C. Bose
C. Boehm
D. Godlewski

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the scientist who proposed the "Pulsatory force theory" of ascent of sap in plants.

2. **Defining Ascent of Sap**: Ascent of sap refers to the upward movement of water and nutrients through the xylem tissue of plants. This process is crucial for plant hydration and nutrient transport.

3. **Identifying Relevant Theories**: The video mentions that there are various theories explaining the ascent of sap, including the "Vital Force Theory" proposed by G.C. Bose in 1923.

4. **Explaining the Pulsatory Force Theory**: The Pulsatory force theory suggests that the living cells in the innermost layer of the cortex undergo pulsatory motions, which means they alternately expand and contract. This motion helps in the upward movement of water.

5. **Identifying the Scientist**: According to the video, the Pulsatory force theory was given by J.C. Bose. Therefore, the correct answer to the question is J.C. Bose.

6. **Final Answer**: The Pulsatory force theory of ascent of sap was given by J.C. Bose.

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