Food feed
Not a root
The knobby piece sold as ginger root is actually a rhizome: a modified stem growing underground. Its buds and branching joints help explain how ginger grows and is propagated.
Berry
Bananas are botanical berries, while strawberries are aggregate accessory fruits. The distinction depends on how a flower becomes a fruit, not on sweetness, size or the name on a grocery label.
Legume
Peanuts are legumes, in the same plant family as peas and beans, rather than true botanical nuts. Their unusual feature is that the flowers develop above ground but the pods mature below it.