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Role of Micronutrients

A few drops o...

Question

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 indicated that it is phloem sap?

A

Acidic

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B

Alkaline

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C

Low refractive index

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D

Absence of sugar

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Solution

The correct option is B Alkaline
Sap, when tested chemically, is alkaline. Because phloem saps us alkaline in nature due to actively pumping of a proton from companion cells to the outer cells.
So the correct option is "Alkaline".

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