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 pholem sap?

Options

(a) Low refractive index
(b) Absence of sugar
(c) Acidic
(d) Alkaline

Correct Answer:

Alkaline

Explanation:

Alkaline pH (7.8 – 8.0) is present in phloem sap where as xylem sap is acidic.