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 indicates that it is phloem sap ?

• A. Absence of sugar
• B. Acidic
• C. Alkaline
• D. Low refractive Index

Answer 1

The correct option is C Alkaline

Phloem sap is Alkaline. It contains sugar. It has high refractive index.

Xylem sap is acidic and has a lower refractive index.

So the correct answer is 'Alkaline'.