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A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test

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A few drops of sap were collected by cutting across a plant stem by a suitable method. The sap was tested chemically. Which one of the following test results indicates that it is phloem sap ?
A. Acidic
B. Alkaline
C. Law refractive index
D. The absoence of sugar
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Correct Answer - B
The phloem sap is alkaline in nature. It continuously pumps protons form its companion cells to the other neighbouring cells during transport of sugars.
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