Phloem sap is made up of

What does the xylem and phloem sap contain?

Assertion : Long distance flow of photoassimilates in plants occurs through sieve tubes.
Reason : Mature sieve tubes have parietal cytoplasm and perforated sieve plates.

In which form is the food translocated from the endosperm to the plumule of a fatty seed like castor?

Which of the following statements is correct regarding the transport of substances in plants?

$A$ 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?