No but its mostly a stem. The Yam plant has leaves and roots but the food is the stem of the plant. If you are talking about the food, yes but if you are talking about the plant, no.
No
No. It is a plant.
Yes
A yam yam is an informal term for a person from the English Midlands, especially one who speaks the Black Country dialect.
Yes
What are examples of erect plant
Yam Potato Manioc
Any part of the yam, whole or cut, as long as it has the skin (peel).
Yam is a vegetable that rhymes with clam. It is a starchy tuber that is often roasted, mashed, or used in soups and stews.
root. unlike potatoes which are tubers
If you want Yams you must plant Yam Seeds in Fall and wait for it to grow.