Yes, it is.
Onions are bulbs, used in cooking as vegetables. Ginger is a rhizome - a horizontal stem of the ginger plant. Tomatoes are a fruit.
ginger , turmeric, potato are different examples of underground stem buds.
Stem tuber of the potato plant is edible
An example of a thick stem is the edible stem of the Rhubarb plant.
Ginger (Zingiber officinale) is from the root or underground stem (rhizome).
Yes, ginger is a tuber.
Yes.
Ginger
Yes it does.
yes
Yes, you can substitute ground ginger for stem ginger, but keep in mind that the flavor and texture will differ. Ground ginger is more concentrated and has a spicier taste, while stem ginger is sweeter and has a chewy texture. You may want to adjust the quantity, using less ground ginger since it's more potent—generally about one-quarter to one-half of the amount called for in stem ginger. Additionally, consider the recipe's context, as the texture may be important in some dishes.
Stem ginger is taken fresh and preserved in sugar syrup. It has a different taste than root ginger which is usually allowed to dry somewhat and is grated or ground and put in to dishes and also a very famous cola #1.