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Vital Theory MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
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3 Questions around this concept.
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MEDIUMWhich of the following theories was proposed by J.C Bose?
According to _________, the ascent of sap is due to active pulsation of the innermost layer of the cortex.
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Vital Theories
- According to these theories, the ascent of sap occurs due to the involvement of living cells.
- The Relay Pump Hypothesis first tried to explain the ascent of sap. It was proposed by Godlewski.
- It suggests that a pumping activity is present between the medullary ray cells and xylem parenchyma cells.
- There was no evidence for this theory.
- The Pulsation Theory was given by J.C Bose. It proposed for pulsation activity in the innermost cortical cells which is responsible for ascent of sap.
- He used the Indian Telegraph Plant (Desmodium gyrans) and an electric probe to prove his theory.
- This theory was not accepted due to lack of evidence.
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