Plants transport food mostly in the form of disaccharides like sucrose but humans transport them in the form of a monosaccharide - glucose.
What is the reason behind this ?
One of the reasons could be -
Source : This
Other reason could be that disaccharides are harder to transfer inside the cells than monosaccharides.
It's very simple, We can't carry dissacharide Bcoz of: 1)permeability of cell membrane 2)human body shows higher metabolic rate and body always go for simplicity to reduce metabolic stress.