Onions are root vegetables. The leaves are also edible, but they are called scallions, rather than onions. Onions are not considered an herb. I am not sure where you get the idea that onions may be homogenized. They are not homogeneous. But you could put one in a blender, if that was what you had in mind.
Onions are plants. They are not herbs nor are they shrubs.
an herb
an onion cell is a plant cell, in which plant cells are rectangular shape and so are onion cells
what part of the plant is green onion
It is the bulb, which is also the edible part.
It is big because before leaves sprout, the bulb is the source of food because without leaves, there is no photosynthesis thus no food unless the bulb feeds the plant (which as I said before, it does). The bulb of the onion also stores energy. Hope this satisfies!
herb
Lotus is an aquatic herb
shrub
Jute plant is a herb
Shrub
Tomato is a herb.
Tomato is a herb.
The chilli plant is an annual herbaceous plant
Yes. Rosemary is a shrub. But it is also used as an herb for cooking.
Mango is a shrub.
No it is a shrub.
A bougainvillea is a shrub or small tree.