Rhizoids同roots 既唔同....

Root has xylem and phloem (vascular bundles) by definition. Thus all non-vascular plants do not have roots, by definition. So they serve the same functions but are anatomically different.

similarity: support and absorption functions
difference:
-true root has specialized transport cells, root hair, rhizoid don't
-true root is usually branched, rhizoid don't
-true root is more efficient in transport and support, rhizoid less.