Q. 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) Low refractive index
D) Absence of sugar
Explanation
[Solution] Phloem sap is rich in sugars and slightly alkaline (pH about 7.5-8). Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.