By what signs can you distinguish tubers from a root crop and a rhizome from a root?

A tuber is a rudimentary shoot of a plant, which means it contains buds.
A root vegetable is a part of a plant that is similar to a root and serves as a store of nutrients, and both the root and the stem are involved in its formation.
Rhizome is a modified shoot; it contains a structure of various elements that are found near the stem and adventitious roots.
Root – its structure contains a variety of elements that are characteristic of the root system.