A few drops of sap were collected by cutting across a plant stem by a suitable method.

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 indicate that it is phloem sap?
(1) Acidic
(2) Alkaline
(3) Low refractive index
(4) Absence of sugar

Anurag Mishra Professor Asked on 26th July 2016 in Biology.
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