No. It is a storage root.
underground root
Tapioca is a root
Tapioca comes from an underground root.
it is a woody stem plant
maybe yes maybe no Sure, Tapioca plant can be grown from a piece of stem provided, (1) the stem is from a full grown plant and (2) the bottom portion of the cut piece of stem is planted in the soil.
yes
No, yam is not an underground stem. It is a tuberous root vegetable that grows underground.
Tapioca reproduce through stem cutting's examples hibiscus.
TurnipTurnip is a bulbA bulb is an underground stem
Onion is an underground stem called a bulb. It grows horizontally below the surface of the soil, from which roots grow downward and shoots emerge above ground.
Carrot, Sugarcane, Turnip & Onion all these are underground stem.
Onion is a modified stem because it is a stem which grows underground