Food feed
Warning color
A green patch on a potato is chlorophyll, not solanine itself. Nevertheless, greening can accompany increased levels of naturally occurring glycoalkaloids, so it is a useful warning sign when deciding what to eat.
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.