Botany - Transport in Plants Question with Solution | TestHub

In food transport the source-sink the relationship is variable depending on the season or the plant's need.

Phloem sap consists of mainly water and sucrose, but other sugars, hormones and amino acids are also translocated through the phloem.

In sugar utilising sink cells, the osmotic pressure must be very high so that they can get water along with sugar from the phloem.

Active transport is required for the process of loading and unloading of sugar.